Small set of customizable classes with there own niche, emphasis on multiplayer, large areas with bosses to farm, random ass loot, and quests.
even without random maps, i half expected one of the npc's to say "Stay a While and Listen".
If you liked Diablo, TF2, FO3, or just shooters/multiplayer rpg's in general, give it a shot. I'd say try before you buy though.