I bite the skin around my nails when I'm bored or nervous. I stopped biting my nails years ago and replaced it with this nasty habit.
My BIG, BIG thing that drives everyone nuts except for me is that I bite the inside of my mouth. I've seen pictures and it isn't pretty. I'm not vain so I don't care. It seems that most of the ladies in my family do this, too. I never noticed it until my husband said as such.
I can't seem to keep the house tidy. I leave papers all over the kitchen counter, books on the tables, coats and sweatshirts on the backs of chairs etc. It takes me so long to clean each weekend because I have to pick up first. I know if I just put it away in the first place everything would look neat all the time and it would only take me half the time to clean but I still fall into the habit.
Too many to list
I fart
I hold grudges and remember every single "wrong" that's been done to me. I can't "forgive and forget."
Beer.
Beer.