Glitches in RPGs. Hate those.
People who chew gum and play with it with their fingers.
People who put used gum where ever the fuck the feel like it.
Cliches of any social/religious/racial group to an extreme degree.
The majority of people who play Halo and Call Of Duty.
People who use too much perfume and collin.
The majority of people who are in the military or left active duty, using the Steve Rogers argument "I don't like bullies."
Atheist who don't know when to shut it about there being no god cause they say so. It's irreverent if there is a god or not. All that maters is you understand a reason behind your morality, which some atheist lack.
Theist(Primarily Christans) who think that Atheist and science are evil and that their info is pulled out their ass, when most of the stuff in the new testament was just a shit Paul the first(the guy who primarily wrote the new testament back around 400 CE) took on the story of Jesus, and then printed in the shit marks in the new copies.
People who don't understand that scientific theories are essentially proven, just still being updated. Example, microscopic organisms are "just a theory," but that is only because we are still learning about them, and expanding our knowledge on the subject. If we made a scientific fact about them now then more details could be added or disputed, making it not a law, because in science laws can't be disputed because of very, very, rigorous testing. That is why we teach evolution in school, because it is a theory, not a hypothesis or thesis.