Everyone has that one NPC that just bothers the living hell out of them. Personally, mine is Nazeem (Screw you man, I do get to the Cloud District, I'm the Dragonborn.) I've killed him on every single one of my characters in various ways. On my rogue, I stabbed him and his wife to death at two in the morning. on my Battlemage I shocked him until he was reduced to a pile of ash. Most recently, on my Warrior, I beheaded him and Fus Ro Dah'd his head to the Whiterun gates all the way from the market stalls. It was worth the bounty. How about you all?