When tv or radio commercials try and encourage you to be happy, healthy, etc. (for the Aussies, I think it's channel 9 that has the "you'd better smile..." advertisements)
People who try and show off by knowing all of the crazy terms for phobias.
People who show off by playing the synonym game with lesser-known words:
Redleader: That movie was confusing.
Annoying Friend: Yes, the ending...it was so abstruse.
People who take up space in public and then give you dirty looks when you try and get around them.
People who stand at an ATM after finished forever organizing their stuff, when they know a line is behind them.
People who hug and kiss each other on the cheek in practiced fashions when meeting up in public.
People that ask me if "the food is good? Do I like it?" a fourth of a second after I put the first bite into my mouth.
People that flip out if one eats foods at weird times of the day. For example, waffles for dinner.
People that flip out if I wear clothing that might not seem apropriate, given the current weather.
The sound of thongs/flip-flops slapping against someone's feet as the person walks.
Commercials for ring-tones.
Lame jokes about drugs in comedy movies.
How most people work 9-5 and most banks, post offices, shops, etc. are open 9-5 on weekdays. At least where I live.