I've always been sort of known as a pessimist but I've never really identified with it in the true sense of the word. I think its more externalized. Sort of like, most people take things as they are but for me to really view anything I have to see the pitfalls and possibilities and naturally the way to do that is see something from a number of different perspectives.
Negativity is usually the most efficient and telling. I've always blended it with positive impossibilities( I meant possibilities but this could work) though, because when their used in tandem you get a more descriptive picture.