I have no issues with HG:L. It is what it is. The problem is that people keep comparing it to it's cousin Diablo, or to MMOs, of which it is neither.

As Bradon said, it's a good game that you can jump into and play for a while. It's not a "hours and hours" kind of thing. I agree that having to go BACK into the underground areas time after time is rather yawn inducing, but I think Flagship should get some credit for making a Guild Wars - esque multiplayer title (hub based, free persistant multiplayer) that, while not spectacular, is pretty good in my opinion.