List your Favourite one [or a max of two if they're equally liked] out of each series,
G1: Predaking/Sixshot
G2: Laser Optimus Prime
BW: Don't really have a favourite.
BW2: I don't own any
BW Neo: Big Convoy
RID/Car Robots tf 2000: Car robots Omega Prime/ Brave Maximus
Armada: Armada Skywarp
Energon/Super Link: Constructicon Maximus or MegaZarak
Cybertron/Galaxy Force: Galaxy Convoy/Noisemaze
Alternators/Binaltech: BT Blue Tracks
Masterpiece: Mp01 Prime
Movie: Leader Optimus Prime
Universe[old]: Nemesis Prime
Classics Universe: Mirage