Lafayette is awesome in the funny way.
I always have to grin when he comes on. I think he is supposed to be a bit of a lighter character.
It really helps to prevent the show from getting too dark, without making him a joke character.
Interestingly, most people seem to prefer Erik over Bill, which I don't really get, but then, I like Bill simply for his angry voice, which is very cool (and he doesn't get a chance to use often enough).
Oh, Sam is such an under appreciated character though.
Always gets the short end of the stick, everywhere, all the time.