Oddly enough, my girlfriend's dad has given me many nick names since I came out to her family. Like the standard stuff, champ, and boyo, and little man.
Non related to my transition, my dad calls me worm (No one knows why) my mom calls me Mort (also, no one knows why XD ) and all my cousins call me hottie ._. They're weird. My friend Sam calls me Mog, or Moggy. Thankfully I never had to go through a name change, because Morgan is a unisex name that I have always liked. Just need to get my middle changed from Alexandra to Alexander.
My gym teacher called me mighty mouse.. because I was really strong in second grade, apparently!
And my girlfriend calls me puddin' breath.... I hate that nickname. It makes no sense, I don't eat pudding! I hate pudding! I think she calls me that to annoy me XD So I call her bubble butt or something like that when she uses that nickname.