Good chill-out games.

I've recently come to realise that after playing only multiplayer games for years, it has made me angry and short-tempered.

I want to move away from this, I haven't touched my ps in two weeks. But I still have that craving to play something.

So what's a slow paced, less intense game you would suggest?

I love strategy and exploration. I have MGS downloaded but I haven't played any of them before, would this fit the bill?

( for those wondering, I was playing Fighting and shooting games ALOT, I'm getting older and I don't have the patience or time to keep up the high-level of play )