Yoda too! And Luke! And R2! I don't know, there's something about Obi-wan that sticks with me. Wise, fearless, a little reckless and always does what needs to be done no matter how it may make him feel.
Vader wins though. He's got the best story, he's the chosen one who fulfills the prophecy in the most unexpected way, he is the most feared person in the entire galaxy, he's the most iconic villain in all of movie history, he has a lightsaber... I could go on.
www.youtube.com/watch?v=8mjYjMxZJCg