I was not going to reply to this post.. Then I changed my mind :P
1 - Getting too close with a co-raider.
2 - Overreacting when I got screwed over by raiding guilds(It's just a game after all... For some reason, being robbed for fresh raid-content really gets to me :S)
3 - Lending those 8k gold to a random guy in trade(Stupid, I know, but I could afford it and decided to give humanity a chance.... I wish I was a fish.)
4 - Taking that candle
5 - "Just one more quest/dungeon/herb/mob..."
Oh, and regarding starting WoW... I regret nothing. *Shrugs* Perhaps this beer belly.. *Pats* :>