Since the same principles underly both roles, I think it's counterproductive to be "different" as uke as one would be nage.
I agree with you Jun, or at least I agree that's how it 'should' be. For me, though, uke and nage are very different experiences. Thinking about where those differences I arise, it seems like when I uke I am 'for' nage, whereas when I am nage I am more 'for' myself.
I don't know if that's even coherent.