Starscream is my number one choice. He's sly, full of himself, very intelligent, and he usually get things going his way. His robot mode is very cool so is his jet/spaceship mode.
It take a lots of guts to say blatantly to Megatron "Watch your back. The moment you screw up, I WILL be the Decepticons leader."
He's also VERY difficult to get rid of.
G1 Starscream is funny and entertaining. Too bad when he finally got rid of Megatron, his rule was very short lived.
My face when Galvatron disintegrated Starscream:
My face when Starscream came back as a Ghost:
My face when Starscream came back to life:
I'm currently downloading Armada and Energon so I have yet to see how is Starscream in there.
In Galaxy Force (Cybertron) Starscream have (at least in the Japanese version) a bad-ass voice. He's way more subtle in this series. And in this one, not only he manage to be Supreme Leader, he also become some kind of GOD. It took everything to take him down!
In Prime, he Killed Cliffjumper.
In Animated, he's a major torn in Megatron's side. Even creating clones and becoming immortal!
The only sad thing is the very VERY small
role in the Bay's movies. In the first movie, they got his voice very wrong, but it was only a small line. In the second, it was right, but his role was minimal. Please, more Starscream in the third movie? Pretty please?