Being crazy

This is something I don't understand and have wondered about for a long time. Again and again I hear people talking about other people and saying something like, "He's really crazy!" In conversations with people they tell me how good someone is and end with, "Oh, and she's really crazy too!" What's all this crazy stuff these days??

It's like, so and so is, "Kind, funny, intelligent...and crazy as well!" Why is it good to be crazy these days? Some people talk about all the lunatic things they have done like travel at over 200 k's an hour on a motorbike without a helmet and hanging onto a three year old child, and they are proud of it. "I'm so crazy, I'll do anything!" They tell it like it is a great story. Well then you are a complete bone-head.

Is doing absolutely stupid things like that meant to impress others? Is being crazy a 'must-have' on everyone's character CV?

I don't get it.