World of Warcraft: The Burning Crusade: got a lot of great memories playing this since this was the only expansion I was in a chill raiding guild and we got furthest progression on our server. Horde got paladins and I rerolled to Blood Elf paladin, my favorite class. Played a lot of PvP and did well in arena.

I mucked around a bit with this at launch, it was my intro to WoW. I only did a few of the dungeons as horde and played a druid. Been meaning to try out a classic private server sometime and see some of the stuff I never got to see on retail.