I bite my nails. I always seem to be banging my fingers against things (anything nearby) to make a tune which annoys people to no end. I should probably try to stop that. I also shake my knee up and down all the time when I'm sitting down.
^ Though I dont make noise with my fingers all the time. Usually when im listening to music, or want time to go by faster... Obviously tapping my fingers makes time go by 10% faster.
I have glasses, and I almost constantly pull my ears back, then scrunch up my nose, to make my glasses sit higher on my nose. Then I just push them up, with my left hand's middle finger, because it turns out, pulling my ears back then scrunching my noise, my glasses dont really move

Not a good habit. (by "pull my ears back" i mean using facial muscles or whatever, not pulling them with my hands

)
Knuckle-popper, back popper, shoulder popper, neck popper.
I also constantly stretch my hands, like bending my fingers back really far, then my wrists, then stretching my elbows. I also rapidly move my saliva in my mouth to make noise.
Yup. Not weird at all..