ZG is probably my least favorite dungeon; though i have loads of great memories in the place; It's just not too fun after you have done it a lot in my opinion--way too much trash even when you skip a lot of it. Skipping spider boss definitely helps make it a bit more tolerable though.
Outside of raids I would have to say I dislike running sunken temple the most though I think it's a brilliantly designed dungeon. It's just too long for a 5 man. If they cut out half the trash it'd probably be a lot more tolerable though (seeing a pattern with trash yet ;).
I think I like every dungeon that Classic offers. They are all so thematically well, full of wonder and mystery.
I guess the one that is lowest on my list is Ragefire Chasm, because it feels pretty spare overall.
Otherwise, I like every dungeon and what they offer.
Gnomeregan for sure
"Blackfathom Deeps" - disgusting
Ragefire Chasm. Dull and unpolished - it feels like an afterthought.
Gnomer, my favorite being SFK or SM
A year ago, in retail, I tried some of the classic dungeons available.
The first time i went to Gnomeregan, close to the end, someone pulled all of the striders.
The second time, a stray imp pulled an entire floor.
Ok, I lied. The actual first time I didnt do my homework and ... I jumped down. And got mocked about it :sad:
Not to mention the endless corpse run that was, the place is just HUGE.
I surely will have some flashbacks when i go back.
Maraudon in total, just way too large and too much level difference from start to end. Uldaman comes second, just also too much level difference from start to end.
I never played Gnomer until I was like level 100 or something because I heard how big of a waste of time it was. That being said I loathe RFD and RFK equally. Dungeons full of pig people who sound like they are bearing down to take a crap when they aggro just wear me out.
Sunken temple. I'm still not much of a fan. Dont really have a justification; just never much enjoyed it.
Gnomeregan for me. Such an awful maze and a pain to get to as Horde.
Funny how Wailing Caverns is a well-disliked dungeon while it's one of my favorite. It's where you get one of your first good upgrades/greens/blues with limited resources/abilities. The atmosphere is great too imo.
Don't like any of the blackrock dungeons.
I never liked RFK.
Favorite is a shocker though, Uldaman. My friends used to tell me during leveling that this dungeon was impossible, so I felt a rush when I went in there, got an epic BOE drop and cleared it on the 2nd try.
I hate to piggyback, but I would have to say Gnomeregon.
However, I'd like to say that I LOVE the aesthetic of the dungeon. I love the look, the feel, the massiveness it brought. I just didn't like the monster/trash design. It just fell flat.
I'd say Maraudon too, full runs take so long and people tend to ditch out.