One thing I need to work on is my habit of putting my fingers in my mouth. Like, biting my nails while in public. Not because it looks dumb, but because your hands wind up touching a lot of dirty stuff in public, and putting them in your mouth isn't a great idea. I also tend to rub my pubescant beard/hold my chin while in class when listening to lectures. It makes me look badass but puts me in danger of getting more germs ugh. I'll probably never stop though.