I can name 7 of them:
People who leave gum on the seats or on the floor
When people talk so loudly that I miss a key point in the story
People who clap at the end and/or during the movies
Endless ads for movies that I couldn't care less about that make me so sleepy that I can't even enjoy the beginning of the movie when it starts
People near me not covering their mouths when they cough
People eating their snacks loudly and indiscreetly
When I have to sit so near the speakers that it hurts my ears
This is why I prefer streaming, DVDs/Bluray or even low quality VHS.