>IYO, which is better one, optimist or realist?

You act like they're mutually exclusive. I've been called an idealist by some people and a cynic by others. If you adopt a philosophy and stick to it blidngly, not matter what the situation is, both are bad.

Which is better? Will, the optimist will give you a happier out look, and the realist will give you a more predictable outlook. Choose your drug, if you want, otherwise, think logically in every situation and you should be fine.