Torchlight is a pretty fun game, and I agree with Yahtzee as well. Pathfinding is generall poor, although the pet teleports to you if you go to far away from it. And the Face-metly-death-beam is just that. It kills nearly everything in at least one hit.
Although, for $20 it was pretty fun, and the modding tools, once you figure out how to not screw up, are pretty fun. Also, there are already dozens upon dozens of mods for new character classes, new potions like more xp, more gold, always identified mods (which are a big help), more levels, etc.
The game is made for modding, and it is fun. The game, that is.