Having odd quantities of anything.

People who assume they deserve respect when they do nothing to merit it.

Girls who love to announce how drunk they are after 2 drinks.

Popped collars. You have to know that you look like a douchebag, and everybody around you thinks you look like one, too.

People with blind adherence to their views, especially when they impose their views on others ("I think X and I am right and you are wrong because I said so.") At least have some evidence or reasoning for your opinion.