I am absolutely a morning person. I know this because I absolutely prefer to get up before the sun rises. And I prefer going to bed earlier than most people. I have more energy in the morning and like to get important things done then. My wife is more of an evening person, but has adapted quite well to my schedule and it's not nearly so clear for her.

My wife is absolutely left-handed. She has trouble doing things with her right hand. I'm mostly right-handed, but I have no trouble doing things with my left hand, so it's much less clear for me.

My point is that everyone has some things that are very, very clear, but not everything is clear. Don't expect to be able to put yourself into pre-made categories for everything.

And don't be upset when you're more adaptable than other people. Failing to classify yourself isn't a problem. Being adaptable is an asset.