There is something to be said for starting missions at 11pm. By the time you get done its nearly sunrise and its hard to be in a bad mood as the sun comes into the sky.
I am at times a very negitive person. I get caught up in stupid big-picture junk and forget to take life one day at a time. I worry about what I don't have or what I'm missing and its not until later I realize what I had. And when people try and get me back on track I am often less than greatful.
I'm working on it though, because its better to fuck up less than apologize more. Saves everyone a great deal of trouble.