When your conversation is interupted by the other persons cell phone, to which they say to me "hang on one sec", then walk away talking about last nights <insert dumb tv show here>.
People who try to hard.
People who think they are doing a good deed, but are actually just annoying and need to mind their business. EXAMPLE: Nice spring day. Mother has a small child in the back seat. It's 72 degrees outside. Mother stops at 7/11 to run in real quick for a soda. The "Do Gooder" walks by seeing small child and calls the police because of a "child left in a hot car".
People who are all worried about how other people type on forums. *cough ranthus cough*
Brussel Sprouts