My "bipolar" diagnosis was made about a year ago, too. Prior to that, it was Atypical Depression. I think it's always been the same thing, no matter how it's labeled.
I do think about this a lot, mostly because I've been constantly engaged in trying to find the right meds and to stabilize somewhere other than in a deep depression.
I have also been recounting a lot of "life history," and looking at how bipolar may fit in, just because my pdoc and I happen to be discussing/clarifying history.
I do imagine we think of bipolar less in time, yet especially if we have the experience of stabilizing.
My pdoc and I have been chasing a moving target for a long time. We are still trying to find a neutral and stable place.
When we are engaged in trying to find sufficient treatment, we naturally think of this more often, as it's a big part of our daily experience.

WC