Well I don't really see it as a good or bad habit, so we'll just call it a habit
I put my head forward then fling it back a lot (like a girl apparently) to keep my hair up, I also put my hands through my hair to keep it up a lot, in fact I did it just now
I also have bad habits of being incredibly blunt with people, procrastinating things and ending up late because of it, and my lack of motivation has caused me to go from wanting to be a vet, to just wanting a job and quitting sixth form, trying college, quitting college
So yeah, not great
EDIT: Retrorock your sig (the spoiler) made me cry D=