I was diagnosed bipolar once, but I found out later on that the guy who diagnosed me as bipolar, diagnosed every single one of his patients as bipolar, and these were patients who got assigned to him at random so that was rather fishy.
My mother and grandfather both have that diagnosis though, I hear it often runs in the same families as autism. I do seem to have a cyclical nature to various things, but not of mood (I have long periods of perseveration followed by periods of burnout and regeneration, but I can be happy and responsible during both).
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"In my world it's a place of patterns and feel. In my world it's a haven for what is real. It's my world, nobody can steal it, but people like me, we live in the shadows." -Donna Williams