Bad Habit

Bad habits, bad habits.  What is a bad habit?  Depends on who you are asking.  What isn't a bad habit to me might be to you if had to deal with me doing it.  I have a bad habit of eating more than I should.  I also tend to be nervous when it isn't warranted.  I have a horrible temper.  All are bad characteristics.  Bad habit though?  I bite off my hang nails with my teeth.  Which is tearing up my teeth.  I also have a habit of drinking too much caffeine.  And there you have it.  Must they be broken?  I will decide.