Hey man if you like Diablo check out torchlight 2.
It's like diablo but much much better, with pet options and the pets can go sell your **** while you keep playing and you can completely customize any class so anyone can use almost any weapon and any spells. On top of all that its 20 bucks.
Once you beat the story you can play on the randomly generated maps with extra xp and challenges or do more run throughs. Seriously made me mad I even wasted money on diablo when such an awesome game was out and much much better( oh and character customization too)