Why are we who we are?

Have you ever wonder- "Why some of us are born go-getters and some just laid back?"
Why some of us want something, goes out and ensures that we get it, some just wait for things to be served on a platter?

I cannot figure it out.

Why do opposites attract? Beats me.
But I know- if something don't change, I go mad.

I'm feeling- weary