I use my real name that everyone calls me on first character because it would feel weird being called something else as it feels like they are talking to you anyways.
but I make more characters if I want to use other names or genders
I use my nickname, Fox, as I get called that more than my real name, Lori, anymore. I almost (almost) get offended if someone who knows my nickname calls me Lori lol.
real name (kaitlyn), not super in love with my name but it feels more natural than nicknames/original characters/etc. my first few islands were nicknames though and it felt sorta weird to me lol.
I use some variation of my real name, like my name is tiffani starr but my in game is tiffy. In previous games it's been Tiff, Tip, Tipper because those are names people actually call me. I don't think anyone outside of TBT has used my real name in years. My family hasn't used my real name since i was a child.
Just another version of my name. My name is Emily but my character is called Emmsey. Discussed this before on another thread but my character is male however I am female. I don't really enjoy making characters that represent me so have always historically used the opposite sex.