Like Max's thread, but reversed sign! There's usually one you can't stand running anymore, either because you've done it to death, or you just disliked it from the start.
I think Wailing Caverns is starting to wear me down. I suffer from severe altaholism and has run this maze without much supplement way too much. I'll run and enjoy a bunch on Classic though, don't you worry.
If I were to pick the one I like the least... I do find Stockades a bit droll. Not terrible, just droll. I think the bottom line for me is I think the original WoW team made excellent dungeons (and it only got better in BC!).
Failing Caverns will always be a bit of a sore spot seeing as a lot of people skipped Ragefire Chasm and then entered WC as their first dungeon with an undergeared, underprepared pickup group and flopped it.
Other than that, I dno, I actually can’t bring myself to hate on any dungeons in Classic. Maybe Gnomer is just really tough and confusing with the punch card quests etc.?
I hate Uldaman. Not just because the level differences in that dungeon are all over the place, but also because it's where you need to go in order to level up Enchanting. I think I hate it for having to do that once, for how long it took me to find a competent group that was willing to do a full run.
On top of that, a full run of Maraudon is just ass. Princess runs are a piece of cake, but a full run? Only once in a lifetime.
I like pretty much all dungeons, but Uldaman is my least favourite. I like the lore but not the design.
The one I surely hate the most is Maraudon. It's like WC, but on steroid... a full run is a nightmare :D Probably because I don't like the setting also... or probably because of the bad memories I had of it: without guides or anyone who really knew the way, it was like impossible to finish it!
Gnomer without a doubt. Even the music drives me insane
Now this is an interesting question. Honestly I'd have to say the static lowbies. RFC, WC, DM and Stocks. I mean at least SFK had challenging mobs. It's just all so broing to me now. I've seen them so many times over and over several incarnations. I could navigate the instances blind. They've lost their magic on their own to me. But maybe if I find the right people we could have fun in them.
Wailing Caverns. I just don't like it.