So this morning I'll indulge - to me, the launch dungeons will always feel more like WoW than any dungeons that have come after them. To this day, I still love Dire Maul, Maraudon (yes, even with its ridiculous internal layout), Stratholme, Upper and Lower Blackrock Spire, Sunken Temple (pre-redesign, when you could get lost in there for hours) and Blackrock Depths. Sure, they were often long, confusing slogs and I don't want a dungeon that massive - it would take too long to run. But I still go to BRD to this day, just to hang out in the bar. I still climb around inside LBRS and drop down from the entrance directly to fall out of the dungeon entirely just because I can.
So yeah, that's my bit of rose-coloring. The dungeons were better in vanilla. What's yours?