I hate Confusion, Sleep, and Infatuation the most. Confusion is just plain annoying and I feel like throwing the DS down when someone uses Supersonic or it says: "It hurt itself in its confusion!"
Sleep is just annoying when I get afflicted, but even more annoying when I put another Poké to sleep. My Pokémon sleeps for like 5 turns, but the foe sleeps for even less when I afflict it.
Infatuation is really annoying, particularly when Audino training. I'm unable to attack most of the time, and the Pokémon that used Attract takes advantage by torturing my Pokémon. But one thing I'm really glad about is that there are male Audinos, because my Black team is mostly male.