So, what's a sweet thing he calls you?

Scout
Toots, your name pronounced wrong
He's a practical joker, and will probably joke around with your name a lot till he gets the perfect pet name for you.

Pyro
Mmmf, Mmmmmhh mmm
Awww..!! Isn't that sweet??

Soldier
Cupcake, Sweet heart, Woman
Okay, the last one isn't really a pet name, but the way he says it is super affectionate..!! In.. Soldier's standards at least.

Demoman
Bunny, Lass, Lovely
You love it when he calls you by your pet name, his Scottish accent dripping as he calls you to him.

Heavy
Your name.
Wow. So romantic.

Engineer
Darlin', honeybee, sugar cube, pumpkin, angel
Dell has a thousand more things he could call you, his southern charm perks your day up.

Sniper
Sheila, Sweet 'eart, Luv, Darla
Instead of darling or "darl", you're now named darla or any other pet name he has for you. He doesn't use them much, but he slips up sometimes and shows how affectionately he feels for you.

Medic
Schatz, Taube
Your his beautiful turtle dove, so taube it is! Coo coo motherfuckers!

Spy
Mon cher, Petit, L'amour, Belle
This guy is so romantic he can't go without a single hour without complimenting you or calling you something sweet.

CBS
Sheila
He's not too keen on pet names, so just sheila will have to do.