Steve: Stars, Sweet Heart, and Sweet Pea
Tony: Sparks, Smartie, Kid, and Tiger(He calls you Sparks because you like to watch him when he's welding)
Bruce: Peanut and Honey
Thor: Warrior and Angel
Clint: Birdie, Wings, and Hummingbird
Pietro: Speedy and Roadrunner
Loki: Love and Trouble
Coulson: Pumpkin