WotLK. But to me it’s sorta like Metallica’s Black Album. Good album. But also the point at which Metallica sold out and went toward mainstream radio songs, and almost everything afterward was crap. Same thing with WoTLK, as it’s when Blizz dramatically changed their design philosophy and began heavily experimenting with difficulty modes and LFG and trying to cater to casuals, and everything went straight downhill from there.