Sorry if this has been mentioned before
Kind of like PoTBS, you get to choose a class and have different skills.
(no, i dont really want this to happen, but I`m saying it so Leroy doesnt suspect anything)
-edit-
I myself am not really into skills. I like it, and I dont. But, I think it would be "neat" for some people, as I`ve only suggested this to help the "MMO" side of the game.