Bad habit

What is your habits that u find disturbing even to someone else?

Like mine:
- Tapping my feet rapidly like i have all the worries in the world
- Turn someone jokes into dark jokes
- Showing my happy puppy eyes if i feel excited (trust me, it's annoying, i lost a potential date with this)

But, as u all realize, people have standards for judging people. Is he/she match my personality/style? Something like that.. And if u feel the anger being treated like trash, then u should remind urself for not doing the same thing. I believe that we have the right to choose our friends, partner, etc. But turning people down is not the best choice. For whatever reason, we cannot beg people to like us, or hate them for disliked us. All we can do is make people feel comfort with our existence. And that include mind our bad habits. As for myself, still working on that :) except for the tapping feet, i must dance to it :p