1. Blather Nonstop About Their...--Dog, child, upcoming vacation; the topic may vary, but the interruptions won't. A recent poll found 53 percent of people were fine discussing a co-worker's wedding -- up to a point.

2. Engage in Amateur Fundraising Activities--Cookies, wrapping paper, popcorn, this disease and that animal shelter -- the fund-raising opportunities co-workers subject you are so frustrating. Parents usually end up doing the fundraising for their children's schools or hobbies at the office. Almost a quarter of people find this entirely inappropriate for the office, while 62 percent are fine with occasional requests as long as their co-worker isn't pushy.

3. Make an Untenable Amount of Noise--Noisy co-workers are a common complaint and can lead to loss of productivity. Over half of people in a Monster Meter Poll said that noisy co-workers disrupted their work "always" or "very often." The list of irritants is usually topped by loud phone calls, loud music or talk radio. A professional environment should be able to give each other direct, non-personal, feedback about things that make it hard for them to do their work successfully. If the noise bothers you, ask your co-worker politely to use headphones, close their office door, take their calls off speaker, or just lessen the noise in general.

4. Operate in a Constant State of Neediness--One of the worst ways someone can annoy their co-workers is by being needy. They require constant attention, assistance, praise or all three. This particular breed of annoying employee will "tell you what they had for dinner and then what they watched on TV last night. They ask questions that you know they know the answer to. They pout when you ignore them or don't invite them to lunch. The best way to deal with a needy co-worker is to address the situation head-on.