I like my user name, Moonwalker. I spend a lot of time in the dark. Part of that is because I work nights, and I rarely see sunlight all winter long. The moon lights the darkness when I go to work.
Another reason I was often in the dark ( figuratively ) was because I never knew what was going on around me. I'm more than half deaf. It's in my family. My dad was half deaf, my brother is legally deaf. I have hearing aids now, so I'm not in the dark anymore.
I like the whole idea of the moon being a light in the darkness. I like to think that my writing is a little light that shines through the darkness of ignorance and apathy.
I shorten my user name to Moon a lot of the time. Luna is also the moon, the root of the word lunacy, something that I've been accused of more than a few times in my life.
I digress. About my pen name. When my husband and I were dating, we took long moonlit walks. We still do, sometimes. I like the moon in all it's phases. I've watched more than a few lunar eclipses. They're fascinating.
The whole mystery of the moon and stars strike my imagination. I like to walk in the moonlight. It's part of the reason I fell in love with my husband of 32 years.