Lately there has been talk in my guild about what fights where fun but really difficult to do, last night we talked about both Ulduar and AQ40.
He said that he loved twin Emps and loved mimi hard mode. it got me started again on how much I loved Ulduar.
That instance was amazing, i did it when it launched and somehow found myself still doing it for fun right before Cata launched.
Yogg, Mimi HM, and Agalon will always be my fav fights from there.
What Raids will you always love despite them being old or you being over the level cap or them not even existing anymore (ZG, Naxx 60, Ony 60).