I have a couple bad habits. I'm not sure which would be my worst.
Matthew always fusses about how whenever I get a new roll of toilet paper out, I never put it on the roll. I don't do it on purpose like he claims! I just don't think about it. He also doesn't like how I can't seem to get my dirty clothes in the clothes hamper. My mom fussed about both of these from the time I could walk, talk, and use the bathroom on my own. Apparently I never learned.
Another habit is when I am nervous or anxious, I bite the inside of my cheeks. Weird, I know. But I have always done that. I guess it's comforting to me.