Im a rather large TF fan myself.
Beast Wars is what brought me back into the TF universe.
I have rather a large collection of TF figures. I just dont have room to display them all!
I only collect Japanese versions of the figures cause the NA versions are crap. Both in quality and workmanship.
I have a few favorite TFs.
From BW my favs are, in order. Rhinox, Dinobot Primal/Megatron Rattrap.. heck I love them all but the 1st 2 on my list hold a special place with me.
BM - Cheetor, Tankorr Megatron - that lovable bastard. Heck I liked them all.. The only one I didnt like in BM was Rattrap.
As for G1 I like them all.
I also enjoyed CarRobots (not Robots in Disguise - again crappy NA version) Superlink and Micro Legends. These shows produced some of the greatest TF toys I seen so far. I do not like the Animated series. I am hoping the new TF series - Transforers: Prime will be good but only time will tell.