Every last one. Oh, OK I'll play along: Autobot: Voyager Prime and Ultra Magnus are tied, with Voyager Grimlock nipping at their heels. Decepticon: Lockdown, Leader Megatron, Blitzwing are all amazing.
Hmmm...tough call, as I love all the Animated figures I've got. Though if I had to choose, it would go in this order Deluxe Autobot: Swoop Runner-up: Cybertron-mode Optimus Deluxe Decepticon: Soundwave Runner-up: Lockdown Voyager Autobot: Grimlock Runner-up: Bulkhead Voyager Decepticon: Lugnut Runner-up: Cybertron-mode Megatron
Swoop, Swindle, Jazz and Samurai Prowl are all pretty good. I haven't opened Shockwave or Sunstorm yet so I have no idea about those two.
Autobots: Cybertron Prime, Bumblebee (Activators), Blurr, Prowl (Either or both) Decepticons: Swindle, Blitzwing I'll probably add Shockwave to the list when I get him...
ledgends: starscream activatiors: optimus delux: lockdown voyager: blitzwing (shockwavve a close second)
While I utterly love all of them, my favourites would be the Dinobots, Blackarachnia, Ratchet, and the Jet Twins.
Activator: Bumblebee, Starscream, Deluxe: Waspinator, Jazz, Blurr, Samurai Prowl (as long as you swap his ninja stars with the original Prowls) Voyager: Blitzwing, Optimus Prime, Skywarp (I don't have it, but I have Starscream and I freaking LOVE the colours on Skywarp) Leader: Megatron...although all of them are quite good.
Atomic Lugnut and EGBB, or "Agent Goldbug" as i call him ^_^ though Grimlock is awesome too... all of them are really.