Diablo 3 was bought on something of a whim, and while I've had fun with it, the isometric loot pinata ARPG is an aging formula which has been lapped thrice by the MMO in the intervening decade since Diablo II was a hot new thing. So I'm not really a fan of the genre to begin with, and that goes double in the case of Torchlight, which was something of a soulless pastiche of well worn conventions with the obligatory "one new wrinkle", in this case the (admittedly charming) pets.
Unless Torchlight 2 is some kind of revelation that exceeds the original in quality by exponential degree, I can't imagine being even remotely interested in it.