I was just looking at Torchlight the other day. I added it to the Christmas list (I tend to just buy things I want so I'm trying to hold off to actually have a list this year).
I played Mythos back when the guys that did Torchlight were putting that together, and of course used to play Diablo (1 and 2...looking forward to 3), so I'm guessing I'd like Torchlight. My only concern from the one review I did read is that it is pretty similar to Diablo. I don't know that it will feel like something new, as much as a rehash of Diablo. I enjoyed Diablo enough years ago that maybe a rehash would be ok!