I have a horrible habit of biting my nails, I mean it is awful. I actually really only get fake nails, because it prevents me from biting my nails; like I will place my nail in my mouth to bite, but then i'm like, okay.jpg. But as soon as they get bad after about, 4 or 5 weeks, i just bite the fake nails off. Hurts my teeth like hell but I can't really stop myself. I also bite them when I am nervous.
I also crack my knuckles a lot, I can crack them about 4 or 5 times in a row. And then a couple minutes later I can do it again. It grosses out my friend, but I am okay with it. Cracking your knuckles won't give you joint problems, since you are just popping the air bubbles in between your joints, but it can wear away at them I believe.
Also I do that weird hand thing, I do a lot of things with my hands while I walk without realizing it. Sometimes I would actually walk around with them raised in the air and NO ONE GAVE A FUCK, lol.
I sit on my other hand while I eat, EVERYTHING. I will do everything with my right hand, and just sit on the other one, weird shit.
I also really like popping pimples, but I never have any to pop. Don't know whether this is a good thing or a bad thing.