1) Actionmasters, I only ever liked these when I was a little kid, I soon realized I'd rather have the transformable version of Starscream, Devastator, ect.

2) Pretenders, I never got how a 10m tall robot could fit in a human body.

3) Throttlebots, They always seemed like cheap imitations of the Minibots, but they did have a cool gimmick.

I'm more of a Classics and Masterpiece collector for G1 so I wouldn't buy these ever. I'll take G1 characters with modern engineering any day over the original in most cases.