CharlesGrey: Titan Quest is/was awesome. One of the best "Loot-'em-Ups", and one of my all time favorite PC games. :)
Darkstone is OK if you like the genre, but it's not particularly unique or special in any way. Does kinda have that Diablo 1 feel, though.
opticq: Oh my god that looks amazing. I loved Diablo 3, any more recommendations? I think I will definitely get TQ
Titan Quest Gold
Diablo 1 - Beelzebub
Diablo 2 - LoD with Multires-hack
Nox
are all you need when it comes to hack'n'slash.
If you want something deeper with more story and less combat, go for Inquisitor - the always underrated and overlooked Czech gem of a natively HD sprite based isometric rpg.
Oh and stay away from Torchlight, the soundtrack is stunning (made by the same guy who made Diablo 1's soundtrack), but the rest is bland and without any soul.