What is one thing you don't like about yourself and what are you doing to change it?

I don't like that I get into pessimistic views of my future so I focus on not treading into gray areas. Realistically I know that future means "hasn't happened yet" and imagining things does me no good and is silly. I don't want to talk myself into living an imagined future instead of letting it unfold as it does. I have minimal control over any outcome:)