Oh gosh, let me try to be as articulate as you in responding on the power dynamic thing 
It's interesting, some of the things you noted as part of a power dynamic in a relationship -- who is into each other more, is giving more to the relationship, etc.
What strikes me is that perhaps you are interpreting relationships in the framework of a competition, which would then lead into the idea of specific disagreements or discrepancies being part of a broader power relationship. I don't think all relationships can inherently be cast in these terms.
I think in a good partnership, you are thinking in terms of what you want and how to get there. Yes, there may be negotiations sometimes, but to me the idea of a power dynamic brings in the idea that at any one point someone is winning or losing in relation to the other person, which is actually antithetical to the idea of a partnership. The problem with thinking in terms of power is that it encourages a zero-sum way of thinking. It also encourages thinking along the lines of 'I did this for you, why can't you do this for me?' -- as opposed to just doing things for each other because you care about each other.
As I said, I do find it hard sometimes to balance myself as an individual with my relationships. But I have found that in my good relationships, this is more of a personal issue for me to resolve -- for example, reminding myself to be more patient. And if DH and I do disagree, we approach the problem on its own merits.
BUT in my less-good relationships, finding that balance gets tied into the kind of power dynamics you are talking about. I find myself less willing to sacrifice myself because it will make me vulnerable relative to him. And every disagreement is not its own thing, before long we are dragging every other problem we have into it.
Basically, I can see what you mean about power dynamics, but I think approaching things in this way can obscure the bigger picture, which is:
Does this man make you happy?
It really is that simple. If he's not making you happy, and he's not willing to change any more than he already has, then no dynamic in the world will make you feel better.
Sorry I don't know if I've explained that decently or not 