Loot. Everyone loves loot, right? Ever since Diablo, crawling through a dungeon to shove everything that isn't nailed to the floor into your inventory is pretty cool.
I didn't have particularly good experiences with Diablo itself but casting my mind back to any of The Elder Scrolls games, I'll have memories of not being able to move because of being weighed down by loot. Remembering Borderlands, I'll be reminded of how difficult it can be to drop one weapon for another, even if, strictly speaking, the numbers are better on this new one.
But these games aren't pure dungeon crawlers, are they? Not like Diablo, and not like spiritual Diablo sequel, Torchlight.
One down. One very big dungeon. Are you ready to push deeper into it?