I've never understood defeatist attitudes. In high school I had a good friend who was the king of self deprecatory humor. He didn't turn out to be the happiest person in the world and when I realized one day that he was rooting for my failure (if he couldn't make it, why should I?) that I cut ties with him. In retrospect, I think the fact that he'd been putting himself down since he was a kid did not open the door to a bright future. I'm all for admitting our many flaws, but it's important to also celebrate our many virtues. It's important to think that we can be successful and do great things, no matter how many obstacles lie in our path. I think it's having that core belief that our self is a great person is what helps us become great, or at least happy people.