Something about ICC is just...meh. I love the bosses and everything, but I didn't get a special "This is ****ing awesome.) feeling from any part of it.
Ulduar is probably my favorite, as many others have said. I loved the lore surrounding it and the general feelings of badassery when it came to the bosses. XT is still one of my favorite bosses, not necessarily the fight itself but just XT as a whole. Not to mention the gear and scenery was beautiful. It's really the only raid I've ever been in where I could actually feel how important the whole place was, lore wise. --- I follow people around on their slow mounts and say "CAN'T LET YOU DO THAT, STAR FOX!" -Cereburus Q
Molten Core by far. You were pretty BA back then if you did Molten Core. And if you did Naxx/AQ40 you were like a god among men.
I will NEVER forget the first time I was leveling up in Vanilla and saw a Dwarf Warrior with the tier 3 armor set in Ironforge. Call it nerdy, but I was like "Okay, that guy is probably pretty good at the game." --- Xbox Live Gamertag: SupahJem