-WoW's artstyle is ugly as fuck (with some exceptions, not talking about environments)
-Warcraft's lore has been irreparably ruined from the very start of WoW, i.e. by forcing Undead and Nelves into Horde and Alliance, respectively.
-WoW's combat is a mindnumbingly boring and dull, which brings me to
-I don't care for raids which are 80% clearing pointless trash mobs, at least dungeons are reasonably sized.
-Best part of WoW experience is exploring the world and questing with other people, and professions/AH