YAKKO
For you: Dolly, sweetie, pretty lady, lovely, angel cakes, pookie poo, sugar, sweet thang, toots, princess, huny bun, sweet pea, doll, chica, doll, jewel (there's more, but I cannot be bothered to write them all)
God forbid Yakko ever call you by your name. That guy just keeps coming up with incredibly strange things to call you.
WAKKO
For you: Honey, cupcake, twinkie
Wakko has never really been one to use nicknames, but he'll use the occasional food based pet name whenever he's begging, or just trying to get your attention.
DOT
For you: Bub, wifey
Dot isn't big on pet names. If anything, you're the one most likely to give her nick-names.