1. People who continuously click their pens.
2. People who use handkerchiefs to blow their nose, stuff it into their pockets, then reuse it later (handkerchiefs are just gross and unsanitary to me image)
3. I really hate people who have a running conversation during a movie ("OMG, that's the spider Sheila! Look behind you Frodo! Oh no, Sheila got him!!" Bitches, it's Shelob and shut your damn mouths!)
4. People who say "no offense" and then say something really offensive.