I didn't end up playing through The Burning Crusade while it was current so WotLK was my reintroduction to WoW after playing the original as a child. As much as I didn't care about the story and the Norse themes of the world we were in, being able to level my first character to max level and fully experience druid gameplay was amazing. I remember so many times being knee deep in elite level enemy territory just because I finally learned Prowl.