Yeah, I'm excluding G1 for super-obvious reasons. So aside from Generation 1, who is your favourite Optimus Prime character?
Nothing against G1 Optimus Prime; I love him too, but we all know that he would just dominate in any popularity contest so for the sake of making this poll/discussion more interesting I've deliberately excluded him.

And if you haven't already done so, check out Episode 100 of Transformers The Basics on Optimus Prime.