[quote name='TheRock88']Don't know if anyone felt like this, but after the movie it felt like you could replace the guy who played Columbus with Michael Cera and the result would have been exactly the same.[/QUOTE]
It would've been the same, except it would've sucked because Michael Cera would be in it.
I liked Cera in Arrested Development, Superbad, and that internet show he did (can't remember what it's called), but after that it became unmistakably apparent that he's only capable of playing one character. The kid in Zombieland can play the awkward role just as well, if not a little better than Cera, and he seemed capable of playing more diverse roles. I already prefer this kid over Cera. He strikes me as a better actor, and his face doesn't make me want to vomit.