WHAT MAKES YOU PLAY AN RPG MORE THAN ONCE?

Characters, definitely. If a game has a character I really like, then I'll play it several times just to see that character again (Persona Alana <3).

I usually play RPGs more than once anyways. I play the game once just to see if I like it first, and if I do, which is pretty much always, then the next time I play it (usually a few years after) I'll try to have more fun this time, like trying out some of the extra stuff.