I read Personality Plus years ago and I think this is a must read book for everyone who wants to understand simple types of personalities and how to deal with them. It classify people under 4 general personality, sanguines, choleric, melancholic, and plagmatis. It listed the strength and weakness of each of them and it's fun to read to start clasifying the people we know under these catagories after I finished reading it.

I most often fall in melancholic area and choleric when at work (IMG:style_emoticons/default/smile.gif) How about you?