Gaby is right, what we're talking about is anhedonia. In my experience, the docs have all tried to medicate the mania and depression into oblivion as a first step in treatment.

Then as others have said, things can be adjusted to allow as much personality (fire? passion? Zest?) back into your life as you can handle. Without flying off the handle, if you know what I mean.

It's definitely a time and topic of discussion for you and your psychiatrist. I'm also in need of such a discussion, so this thread is a welcome thing for me. Please keep us updated if and when you have that talk.