I can only answer a few of your questions, in my own opinions, as I'm interested to know the answers to the ones I can't help you with.

I think that most of the questions you asked are relative to the people involved. To me, a Dom/sub are equals and there isn't any distinct differences between them as people, but again it depends the people. There are some Doms out there who think subs are like second class citizens and some subs who think Doms are a cut above the rest.

For me as a submissve I long to be controlled and dominated and from what I've learned and understand Doms have a need to control and be served. It should be a win win situation for each party. The Dom gets pleasure from having the submissive's gift of submission and being able to control her/him and the submissive is happy because s/he makes the Dom happy. Atleast, that's how it works in my book.

It depends on the people and their experience in the lifestyle as to the level of experience and knowledge. There are a lot of subs out there who are more experienced than some Doms, and vice versa. No one ever know everything and a D/s or M/s could should continue to learn from one another through out their entire relationship.