I thought I’d mention a game I tried recently. Torchlight (standalone demo here, or Steam demo here) is an excellent Diablo-style game (made by some of the same people who made Diablo and Fate).
Basically, they took Diablo II, ground it up into its essence, and then distilled that essence into pure dungeon-crawling ecstasy. And it looks beautiful.
This is the game to play if you liked the loot-hoarding aspects of Diablo II. The skill tree is arguably simpler, and there are only three classes (instead of seven), so you don’t have to think as hard about what you want to do with your character – you either hit stuff to death, magic stuff to death, or summon stuff to death.
It also has a few nifty features that I wish Diablo II had. For example, it has a shared stash. Anything in it is accessible by any of your characters. If your fighter finds something your alchemist would find useful, you just stick it in the shared stash – it will be there when you next play your alchemist.
Another feature is that your pet (which you have in place of a hired mercenary) can be sent to town laden with loot. It comes back with the gold from the sale of said loot. (Penny-Arcade had a humorous take on the idea.)
Torchlight is single-player only, which is perfect for me, since that’s the only way I play Diablo-style games, and it’s pretty cheap at $19.95 on Torchlight’s official site, or $19.99 on Steam. I highly recommend it. (Personally I’m waiting on a Steam sale, because I have other games to play right now, but I’ll definitely buy it at some point.)