My biggest pet peeve is messing up knots. Also cutting the main line instead of the tag. The other day I glanced at the TV to check the score of the game while cutting the tag end, looked down and my crankbait was laying next to my foot. It's even worse when you tie a really nice knot! Another thing I can't stand is when people net every fish they catch, even the little 12inchers they need to play it for ten minutes then net it...