I think Torchlight is an horrible choice to fill your time.
I enjoyed one run through it... but other than that, even with mods, I found it to be extremely unsatisfying.
Heck, after it, I just came back to D2 if I want to kill time that way. It brings nothing worth it to the table and does -nothing- better than D2, actually does quite a few things worse, especially ITEMS... if you enjoy getting items in Torchlight, well, sweet, but I just don't see myself liking that part of the game. It just doesn't feel good whatsoever. Its not about finding things or not, its just that the itemization is just horrible and unsatisfying. Its hard to describe.
Hey, thats my opinion on the game, not everyone think like I do. Its still worth playing once, but I just never really played it again. Lets just say it didn't hold me until D3 at all.