I found this game to be very addictive, i'm playing it for the third time now, and i'm still having fun. This time however i also have the Underworld addon, which is pretty much more of the same, except a bit harder. Still, there's no real challenge for a level 51 battlemage who can cast fireballs that kill a dragon with only a few hits.
Maybe it's time to change characters, i have never played anything else than the battlemage.