That sounds like a perfectly egalitarian relationship. Interestingly, gay couples are more likely to have those types of relationships than straight couples, at least according to a study by Kurdek from 1995 (I definitely did NOT have that memorized, I was reading through my Developmental Pyschology textbook today while helping my brother with homework.). On the down side, the reason it's more likely is because homosexual couples tend to support each other more (help each other through family rejections, discrimination, etc.). Just something this made me think about... there's always a cost involved...
More specifically, I think that this will not be what everyone will want or strive for even, but for a lot of people, it is a nice thing to wish for. I don't really know if everything in this is natural exactly unless you actively work for it; perhaps if it's what someone wants, they can print out this list or what not, and work with their partner to have this kind of relationship.
This seems like a near perfect relationship, and this kind of relationship comes with a lot of work and would never just happen. Unless Jesus was gay, anyway (actually a possibility! Piss off fundamentalists with this fun fact everyday!).
Kidding and probing aside, this was very nice to read though