Um, all action heroes have pretty much the same persona. I don't think someone timid is capable of saving the world from aliens, disease generated zombies, or evil masterminds. And you should check out his dramas; Pursuit of Happyness(sic), Legend of Bagger Vance, Seven Pounds, and an older movie I'm drawing a blank on where he tricks rich families into letting them into their homes. That movie was brilliant, and I don't know how he didn't win an Oscar for it. He's one of the greatest actors of our time, right up there with Johnny Depp imo, but as you mentioned, a lot of people are just jealous of him because he's black and successful (not calling you a racist in anyway).
Just a side note, I hate the unwilling hero in movies and anime, it really pisses me off when people don't take up the responsibilities their given.