One the whole, most post-G1 Transformers bios are pretty much crap. There were some stand-out exceptions in Beast Machines, Cybertron, Combiner Wars etc., but for the most part they're just really ordinary.

And I think that this is what happens when Hasbro stopped asking professional writers to write the tech spec bios for the toys. During G1, it was writers from Marvel Comics who wrote not just the bios for the characters, but practically created the entire mythos for Transformers. Autobots, Decepticons, Cybertron etc. -- all made by Marvel. And Marvel treated the Transformers as if they were comic book characters. They fleshed them out. Each toy had its own unique personality traits, abilities, weaknesses - and more importantly something that is very rarely found in Transformers bios these days - personality quirks. Many G1 Transformers just had something quirky about them that made them unique and endearing.

e.g.
* Thundercracker: morally conflicted
* Bumblebee: desperate to prove himself
* Soundwave: blackmails fellow Decepticons for personal advantage
* Breakdown: paranoid
* Tailgate: delusional
* Swerve: reckless
* Silverbolt: supersonic jet who's scared of heights
* Cosmos: incredibly lonely and suffers from boredom
* Snarl: anti-social
* Swindle: avaricious
* Groove: pacifist
* Hound: anthropophile
* Hook: narcissist
* Dead End: emo
et al.

We generally don't get that anymore. Toy bios these days are mostly the same. They usually just tell us how 'kick arsenal' this toy is and why you should get him! It's all just about the awesomeness of the character, no weaknesses or quirks or other things that make them an individual person.

Let's Compare: Powermaster Optimus Prime

Here is the packaging bio for Titans Return Powermaster Optimus Prime (2016):

Optimus Prime will stand against any threat. Autobot Apex helps him face the enemies that even the Autobot Commander cannot face alone. The Titan Master carries a portion of the spark - and power - of Optimus Prime, increasing the legendary warrior's already immense strength, speed, and intelligence.

Now here is his extended bio:

Optimus Prime will stand against any threat. Autobot Apex helps him face enemies that even the Autobot Commander cannot face alone. The Titan Master carries a portion of the spark, and power, of Optimus Prime, increasing the legendary warrior's already immense ability. With that boost to his systems, he charges into battle as Powermaster Optimus Prime.

Now here is the tech specs bio for G1 Powermaster Optimus Prime (1988):

"Freedom is the right of all sentient beings."
The beloved leader of all Autobots. Dedicated to protecting all life forms -- mechanical, human, and otherwise. Willing to sacrifice anything in order to end the Autobot/Decepticon conflict. Wise and compassionate... the inspiration that fuels every Autobot. Binary bonded to the super intelligent Nebulan computer programmer, HiQ. In engine mode, HiQ handles all of Prime's power needs. Trailer transforms into armed fortress, complete with laser rifle, concussion blaster, and 2 twin particle beam cannons. Tractor and trailer combined construct Optimus Prime's new super-powered robot form.

Now here is his extended bio:

Allegiance: AUTOBOT
Sub-Group: POWERMASTER
Master Component: HI Q
Function: AUTOBOT COMMANDER
"Freedom is the right of all sentient beings."
Profile: Sage, scholar, soldier- Optimus Prime is all this and more. To peace-loving beings across the galaxy the revered leader of the Autobots is the living symbol of freedom -- a beacon that shines against the forces of darkness. To his followers he is a bottomless well of inspiration and courage from which they draw their strength. And to the evil Decepticons he is the one force in the universe who can shatter their dreams of galactic conquest. He has dedicated his existence to the protection of all life forms -- mechanical, organic and otherwise. His wisdom and compassion are legendary. Although fate has set his course on a path of destruction and strife, his greatest desire is to bring peace and harmony to all inhabited worlds everywhere. Optimus Prime is binary bonded-to Hi Q, a humanoid whose genius in computer programming and design was renowned on his home planet of Nebulos. There he ran the Hi Q Industrial Research Complex, a facility that had, over the past few decades, dramatically improved the quality of life for his people. While trying to help several Autobots rebuild Optimus Prime, he made the decision to join the Autobots and defend Nebulos against a Decepticon attack. To do so, he and several of his employees underwent The Powermaster Process, which, through bio-engineering, gave them the ability to transform into the engines that their Autobot partners required to power their fight against the Decepticons. Hi Q was paired with Optimus Prime. So far their collaborative efforts have met with great success.
Abilities: Optimus Prime is the strongest and most intelligent of all the Autobots. His strategic, logic, and programming skills have no equal among Transformers. He splits into-three modules: robot, auxiliary and battle station. The van portion of his trailer truck mode transforms into the robot or "Optimus" module, which is the part of him that is sentient and is most commonly referred to as Optimus Prime. In this mode he can lift (1815t) and exert a force of (845kg per cm^2) with a single punch. He carries a laser rifle with which he can bum a hole in the nose cone of a Decepticon jet at a distance of 50km. And with his outstanding visual acuity, he rarely misses. His auxiliary or "Prime" module is a small cart-shaped device that he stores in his trailer portion and occasionally uses to sneak behind enemy lines for reconnaissance purposes. He can maintain radio control over it within a (1930km) radius. Having his auxiliary unit in the field is like being there himself. The trailer portion of his truck turns into his battle station module, which also serves as an armed fortress. It is equipped with two concussion blasters, two twin particle beam cannons, an auto-launcher that shoots a variety of artillery and radiation beam weapons, and a landing platform. An antenna within the battle station allows Optimus Prime to control it and also to maintain a radio link to all Autobots within a (80km) radius. The antenna can be adapted to a satellite hookup, which provides a tenfold increase in its effective range. In robot mode, he can combine with his trailer module and more than double his size and quadruple his strength. Traditionally, the elders of the Transformer race have bestowed upon an individual of great courage and wisdom the Creation Matrix, an intricate program encoded in light patterns within a crystal. The Matrix grants its bearer the amazing ability to help create new Transformer life within the lifeless shell of a newly constructed Transformer body. Since the beginning of the Autobot-Decepticon war, an Autobot Commander has typically possessed the Matrix. The most recent Autobot leader to be so honoured was Optimus Prime.
Weaknesses: Although Optimus Prime can function as three separate modules, injury to any one of them is felt by the other two. The auxiliary unit is particularly vulnerable. However, the Optimus module is by far the most important unit of the trio. Although he could survive without the other two, they could not survive without him. Otherwise, the only weakness he could be accused of having is compassion and concern for the safety of others. He would be a more effective military commander if he were more ruthless, but then he wouldn't be Optimus Prime.

Yeah... I really miss the good ol' days when toys had well written bios and I would enjoy just reading them off the shelves. Whenever my mum took us shopping, I'd ask to just hang out at a toy store and wait at a rendezvous near it. While she shopped for groceries etc., I would spend that time reading through all the tech spec bios.