What does a bipolar person look like?

I had an appointment today with a psychiatric nurse practitioner.  She was one of the several psychiatrists/ therapists that have told me that I do not look like I am bipolar.  I am now wondering what is a bipolar person supposed to look like?
I don't really know anyone else who is bipolar...my brother is struggling with the symptoms, but has not been diagnosed.  He looks "normal" to me.
I decided to google "bipolar person" and these images are ones that popped up.

  Their expressions show emotion; maybe because I am stable on meds right now I look non-bipolar.  So tell me, what is a "bipolar person" supposed to look like?