Most Fav Gimmick:
Combiners: This wins it for me, I love the fact that can unite to become something more. The evolution of the modern versions such as the HFG and the poseability we get are awesome.
Minicons: To link them as a way to find or bring out a hidden weapon is a clever touch.
Least Fav Gimmick:
Bodiless Headmasters: This I find is really annoying! What's the point of a headmaster that doesn't have a body??
WANTED BOTS: G1: Horri-bull, Snarler, Mainframe, Chop Shop, Ransack CHUG: Spin Out, Cordon, Brotropolis Rescue MASTERPIECE: Acid Storm
ENERGON: Six Shot