Top three faves in no particular order: Optimus Megatron Ironhide Honorable mention: Soundwave Brains
I have to go with Ironhide and Optimus. Although I could also stand to listen to Jazz speak all day, and I will admit that Roadbuster sounds kinda cool. I guess I liked more than I thought..............
Gonna have to go with Optimus. The intro speech in the first movie, as well as arrival to Earth, still give me goosebumps.
I feel like Optimus is a given so I'd have to go with... Jetfire. I could listen to him rant and rave all day. "Don't get snippy with me, fleshling. You were duly informed!"