Love the Prime Wars trilogy, or maybe I should hate it, as it got me back into collecting again after a long hiatus. Anyhow....

Combiner Wars was great, we got a ton of classic characters in a consistent scale together and we even got some surprises like Skylynx.
I understand the need for repaints and retools not just to make money back from a mold, but I can imagine it's not easy to make mold after mold that all meet the same length dimensions when in limb mode. I have 16 combiners on my display currently (that's counting CW, UW and POTP combiners). I don't mind that they aren't perfect, they're good for the price point and I couldn't imagine parting with them.

Titans Return furthered what we got with CW in terms of unique characters. If you had told me ten years ago we would get the jumpstarters in CHUG form I'd have laughed in your face! I don't care for headmasters really, but it's nice that they can pilot the vehicle mode (in most cases). The level of detail and G1 accuracy on the figures from this line was fantastic too and that
titans class Trypticon is pure awesome!

Power of the Primes combined what I loved about both previous lines - combiners, G1 accurate updates and threw in an evolution gimmick too. I know not all like the evolution thing, but I thought it was as well done as it could be for the price point and hey let's throw in an Optimal Optimus with an amazingly gorgeous throne repaint for the sake of it!

All in all, it had it's flaws, but I do appreciate what HasTak did here. My favourite line of the three would have to be POTP, but I love them all. I was sad when I found out POTP was only going to last 3 (or technically 4) waves.