Well I've never really had a nickname.
My mom calls me MooMoo. I think it has less to do with me and more to do with something when she was growing up because her childhood friends call their daughters MooMoo too.
The people at my Job call me Missy. My Job ID looks like Missy so people just call me that.
Everyone else just calls me by name.
My brother called me Jellybean growing up. But it wasn't nice. It was his version of Retard.
I am known to some as Demon. Also courtesy of my brother. Every time I did something that got on my brother and his friend's nerves or said something stupid or uncool or whatever they would say "DEMONDRY!" Recently I ran into one of his friends who then explained to the girl he was with that I was the "original" Demon who insipred the term "Demondry".