Asking for a womans point of view?

Let me state that this is not a woman bashing question! I am curious as to why women are in general all crazy. They all seem to have there own bit of baggage(all different from one to another) I have been with many different types and can never seem to understand what it is that drives them so crazy. They constantly need affection,something to talk about,someone to ***** about. Or on the flip side they are constantly smothering or trying to get you to pay attention to them. Why do they not have a even keel type of personality?