If you are a very suspicious person, or if you are suspicious in everything, then you might be a doubting Thomas. If you don't know the origin of this idiom, ask those friends who study the Bible.
If you are indulged in think about some big problems that obviously have no easy answers, you are a hamlet. "To be or not to be, it is a question."
If you always plays againt the others and make people unhappy, then you are nuts. Just remind you that there are always some nut collectors and they are ready to handle you.
If you work very hard yourself and also force your subordinates to follow your example, then you are a workoholic.