I was thinking about making this poll last night. Then, I was tired and thought I'd leave it to the morning.

Anyway, I'd go Sith. You are more likely to win. Especially after Ep 3, there are only 2 Jedi's left. Plus, you get a red lightsaber, which is always cooler than blue, green or purple. Also, you can kill your enemies and not get condemned for it. In fact, you get praise for killing.