I've found the B/F dungeons have become incredibly boring (and I'm only in Act 2), so I just nip in and find the way down to the lowest level as quickly as I can to get the quest item, then TP back to the quest giver to get the XP.
However, a few times a monster has dropped a very nice item, so that's been a bonus. And one dungeon featured a class of monster that usually dropped charms, so I was able to load up on them, too.
[color:"red"] F [/color]
