Here's a few more from my personal experience that bother me, mind you I work in a cubicle farm:
People eating crunchy type foods in their cube. Save your potato chips, popcorn, and carrot sticks for the cafeteria where it's okay to eat as loudly as you want.
People who take a sip of hot coffee or tea, and go "AHHHH" after every sip.
Loud talkers. Yep, you know who I'm talking about. A person can be in their cube 2 feet away but they still talk to them at the top of their lungs.
People who have nothing better to do than hang out in the entrance to your cube trying to talk to you about non-work related things while you're doing work. Normally I don't mind this but when the person has been there for more than 5 minutes it's a bit much. I've seen people shooting the breeze outside of a cube for up to an hour.
People who complain CONSTANTLY about their work situation. I don't want to hear it. If you hate your job so much find another one.
Office know-it-alls. Come up with a solution that isn't theirs and they're threatened, and will offer up their way of doing things. I haaaaaaaaaaaaaaaate these people.
Fast walkers. There are people are my office who literally speed walk, jog, or run so fast to get from point A to point B that 1. They almost bowl people over trying to get where they are going, 2. They scare the crap out of me as they run past my cube or surprise me coming around a corner. How much time could you possibly be saving by doing this?
People who take their work too seriously. Don't confuse this with me taking a stab at people with good work ethics. But when I go out to lunch with you that is my time, and if it isn't a "work lunch", then I don't want to talk about work. This is my time to relax. I work hard and work and I leave my work at the office.
People who come to work sick. This is what sick days are for. If you're sick, STAY THE FRIG HOME. I don't want your cold. The business won't collapse if you stay home a day or two.
People who don't wash their hands in the bathroom. I've seen it all. People go to the bathroom, and walk right out. Others put their hands under the water for NOT EVEN A SECOND and think that counts as washing their hands.
** Eve, about the seafood thing, I don't mind it when they do it in the cafeteria. Only when they eat it in cubicles, which can disrupt other's work.