I used to call my friend, Tori "Dollbaby" and she'd call me "Babydoll"
My exgirlfriend never call(s)/ed me anything but "Babygirl"
My best friend calls me loads of things, specifically "Bitchface" but in a loving way.
I called/still call my ex "Pookie" because he's this big italian guy. Like calling a bulldog "Fluffy".
My other ex was "Babe" and he called me "Baby", if I ever called him anything else he'd get emotional and upset -raises eyebrow-
I call everyone pet names though; love, darling, sweetheart, sweetums, dolly (my fav.), pet, sweety, lovely, dollface, munchkin for kids, honey, pookie, (name)yface lol.
In study hall I renamed a lot of people, but that's more nicknames..Some kid was "Twix" another "TicTac" another "Curls" lol yanno.