Karaja

What is it about WoW that keeps bringing me back time after time? Ive been playing MMO's since my early 20's everything from Asheron's Call to Star Wars Galaxies, but what baffles me is what keeps pulling me back to WoW. Its not the graphics, they could be classified as cartoony at best(I think LOTR, has done very well with the fantasy graphics). Its not the crafting, so many other games do this so much better(EQ2 and AC2 come to mind). Its not PvP they've pretty much killed the World PvP I use...