Bruce: he calls you by your name in front of the boys

 but he calls you darling when you are alone ;)

Dick Grayson: he calls you marshmallow, love, a Classique honey of course.

Jason Todd: he calls you Doll most of the time because he thinks that you look like one 

Tim Drake: he calls you sweet cheeks because you have red cheeks 

Damian Wayne: he calls you L/N most of the time but he shows his 'soft' side a little bit when you too are alone so he calls you Habibi 

(Habibi = حبيبي means baby in Arabic)