I have such a love and hate relationship with the Deep Roads.
On one hand, it's glorious. Never have I felt more that I am in a party of adventurers treading through blighted ruins of dwarven civilization, combating the ruin of a people in a fantasy setting. I replayed the section where we're supposed to cut a line through the Spawn with the Legion at our backs more times than I can count.
On the other hand, after fighting my tenth enemy party composed of two Darkspawn mages and three bligthed spiders, I'm like "GET ME OUT OF HERE! SUNLIGHT! SUNLIGHT!"