I know that a lot of people love this. Wilhelm2451 and other bloggers whose opinions I respect are full of the game's praises but I still don't get it. I don't care if it follows in the illustrious foosteps of Diablo, Dungeon Siege, Titan Quest and its own direct antecedent Fate. I find the game boring.
There are times when we all can use a bit of mindless button mashing but I think that this market segment is very well covered by free to play flash games. To my mind both Sonny and Monsters Den have more depth than I have seen in Torchlight.
EDIT: On second reading my post above comes across more negatively than is warranted. For balance I should point out that Torchlight is very well made with a very well polished interface.The combat though repetitive is well done and the sounds in particular are very satisfying. The game is actually a lot of fun to play at first. Its just that I find this type of game play gets repetitive. Perhaps my biggest complaint is that it remains compulsive long after it has ceased being entertaining.