Day 4 - A habit that you wish you didn’t have

What habit do I wish that I didn't have?  Oh there are plenty of them!  But I think one that I am trying hard not to do, but failing miserably is when I get nervous or anxious I like to pick at my finger nails.  It's terrible because I really wish that I could grow them longer, but I just can't.  That one is at the top of my list of habits that I want to break.  What about you?  What habit do you wish you didn't have?