Photo: Henglein and Steets/Cultura/Getty Images

6 of 7
Chronic Complainers

These people are bitter and angry but haven't dealt with the reality that the source of their anger is internal.

What works: Your only option is generally to put up with them and stay away when you can. Don't agree with their complaints or try to placate them. They have endless fuel for their bitterness and simmering rage.