My novice master once said that he felt like I was always "waiting for the other shoe to drop." That is to say that my general expectation was that things would go wrong and end up in disaster.
I guess it's true, in a way, that I have a pessimistic view of the world--but I would protest that it's based on experience. On the positive side, a pessimist is better prepared, both materially and spiritually, for actual crises and disasters when they do arise. This is the attitude that one of my high school friends used to call the theory of the "survival of defeatist."
Today is one of those days. I have to go to school because my "second reader" has promised to have the latter two chapters of my STL thesis marked up with comments and revisions. Everything has already passed through the director. So this is really the last chance for anything to go really wrong with the whole project. Hopefully her corrections will be simple fixings of awkward or overly colloquial constructions, filling out places where I have elided logical steps or committed a non sequitur, etc. and hopefully nothing that demands structural or wholesale revision and re-write.