Found this and thought it true/funny:

"For many people, their 27-month tour will be one of the most challenging things they ever do. As a volunteer you will be bored, you will be lonely, and you will get some sort of exotic illness. You will need a good sense of humor, heaps of flexibility, and donkey carts full of patience. You will have to lower your comfort level and raise your tolerance level."

This was written by someone who was a PCV over 4 years ago who served in a very different geographic place than myself, but it rings true I suppose no matter where you served.

(the source)http://www.transitionsabroad.com/publications/magazine/0409/the_real_peace_corps.shtml