Great topic BTT!
I think Action Masters are great! It's your favourite character, now compact and posable! I can't complain, Jazz got a skateboard strapped to a gun, possibly the coolest G1 weapon there is. Not to mention the line gave us that positively exquisite piece of art: Thundercracker in dungarees.

1. Vote for your Worst G1 Toy Concept in the poll
2. List your top 3 worst G1 Toy Concepts with a brief description why you feel this way.

1 Headmasters
Who thought this was a good idea? Brainstorm? Are you kidding me?
It's the main reason why I couldn't take season 4 seriously. You know, aside from the fact that it sounds like they all went off to teach in the UK.
I don't see how this concept makes logical sense in fiction either, especially with organics forming the head. What happens when they die? How is a headless robot supposed to fight?
This particularly bugged me when IDW took Sunstreaker's head off. I'd just gotten into reading the comics and one of my favourite Autobots was ruined for the foreseeable future. I'm just thankful they fixed him.

2 Pretenders
The saving grace is the adorable inner robot. Some shells like Bludgeon and Chainclaw are pretty cool. The majority of them just look daft though, like that half-naked viking dude.

3. (Optional) Would you still buy these toys if you needed them to complete your G1 Collection?

Fortunately, Jazz kept a cool head on his shoulders, so I won't have to buy any Headmasters.
As for the Pretender, just, keep the helmet on please.

Oh, and for all you action master haters, I'm happy to adopt any unwanted AM Jazzes. He'll go to a good home for a change.