Staying upbeat and positive is a result of realizing that it's useless / unproductive to be negative or apathetic.
Pessamistic/Negative people are often people who think they are failures, for whatever reason. I hate being around them, they are contagious.
Apathetic people bug me, obviously they're mentally/emotionally damaged.
Getting angry is somewhat normal, but how you deal with it is important. (Flaming or Ranting on ATOT is how some of us deal with anger, huh?) Sometimes, i feel i need a punching bag because of 'people' I encounter.. some people are jus wacko!