My favorite instance, Molten Core - So many good/bad memory's from that instance =)
Karazhan, obviously...run little girl run!
i just love ice crown citadel =)
My favorite instance is probably Wailing Caverns, too much nostalgia.
Favourite instance: CoT4, Stratholme, because of the lore in it, remembers me to WC3
Iron Docks
ICC
Karazhan, definately Karazhan.
My favorite instance was Scholomance, it had that spooky vibe.
I really liked Old Hilllsbrad Foothills. It was fun going to Southshore and seeing a few lore guys.
You are not Prepared! Black Temple!
Gotta say, my favorite instance always has been, and always will be The Mechanar.The idea of having to assemble keys, forcing you to kill additional bosses. That, and the positive/negative debuff from the first boss was a fantastic idea.
So many good ones.. my favorite though? hmm.. well that would probably be Onyxian's Lair. Day one of going there, it had that feel of the old dungeons and dragon's where your party enters that dark mysterious cave in search of slaying and dragon and walking out her well kept treasure.
Molten Core - Nuff said XD
Trial of the Champion
HiDungeon:The Temple of Atal'Hakkar the old one, not the new(this one is boring).Raid: Karazan
Karazhan - old school...must mean i'm old too...
<3 Botanica!
UlduarSo much fun, and was unreasonably hard for me, but I love it!
Karazhan is great. :)