Overly optimistic is worse. It is a continual rain of disappointment.
Overly cynical is best. You are constantly surprised in a good way!
But you didn't ask about "in moderation". You clearly wanted to know which was worse in an overly way...!
Depends on how it motivates you. Some people let their optimism encourage them to try harder, others assume it means everything's going to work out anyway and don't bother.
Some people who are cynical take a "things can't get any worse" attitude and if it's good they're pleasantly surprised, if not it's what they expected. Others allow cynicism to shut them down and use it as an excuse not to do anything at all.
Is it still regarded as being cynical if you're right?
I guess it depends on how quickly you can bounce back. If you're overly optimistic you are bound to be disappointed just by the law of averages. Will you be able to maintain that optimism in the face of repeated disappointment? On the other hand, while you might not have the disappointment if you are cynical, you might no try very hard either which will lessen chances (of course, there is that old saying that cynics are just disillisioned idealists....).
I wish they'd fix the spell check thingy...sorry for any typos
Keep him away from Vegas
Hmmmm. Both can be detrimental at times. But I might say overly optimistic is worse because it can make for really painful disappointment. Ya know not everything works out or goes our way, so can't put too much stock in it, otherwise we let our OWN selves down.
No, life don't work that way. He may be right, he may be wrong, but in all cases he most certainly needs to be ready if he's wrong.
PMA is best (Positive Mental Attitude).
Overly cynical is worse because that gives people a reason not to try anything and not trust anyone and makes the world an ugly place.
Counter-intuitive to my way of thinking, but okay.