Dear, sweet Jesus.
1. Chewing with your mouth open and smacking/popping your gum. You sound like disgusting cows when you do that. And you look gross. CHEW LIKE YOU HAVE A SECRET!
2. Basic grammar/spelling errors. It isn't that hard.
3. Burping/belching in public. I mean, ew. Is it really that hard for you to keep your mouth closed, cover it with your hand, and try to do it quietly? Come on, people.
4. Having dirty hands. I hate getting them dirty. It feels disgusting.
5. Separating eggs with your bare hands. GROSS GROSS GROSS. Not only are your hands dirty now, but you have put germs from your hands all over the egg, which is going in someone's food. And you've just made a big mess all over yourself. Either use a separator or use the egg shells. (I work in a kitchen and see this all the time.)