Character flaws: probably any number of cognitive biases at any given time:
List of cognitive biases - Wikipedia, the free encyclopedia
Disorders: when I took abnormal psych, I diagnosed myself with all kinds of disorders. I definitely have some social awkwardness and over-think things and struggle with fundamental concepts by overcomplicating them. There's a lot of random noise in my head, I guess and a lot of uncertainty about the right way to do things. But none of this appears to interfere with my personal life or work; I have made it through a BS and an MS while raising a family (two daughters). Nearly halfway through my PhD now.