Gaming: The Big Red Button
"Thinking isn't getting us anywhere!"
-Tidus, Final Fantasy X

Ginger talks about how some people play characters that take every foolhardy action they can, constantly taking unneccesary risks and doing exactly what they were warned they shouldn't do.

As an opposite scenario, I've played in a game where players wouldn't try anything. Everyone was too concerned about what would happen to act. They talked and talked but there was little action. Sometimes you need an impulsive character, a character who doesn't see evrything as a game of chess that you have to predict every reaction before making their move. So, in that game, I took it upon myself to be the impulsive one. If anyone was going to accidently destroy the universe by trying something really foolhardy, it had to be me.

The impulsive characters make sure things are always interesting. A whole group of them would be tough to deal with as a GM, but I'd rather not have a group that didn't have at least one.