Okay but the Batkids using Dad with Bruce when they know hes been having a rough day-
Bruce comes back from a JL meeting upset, not because something went wrong but because they aren't acting like a team, and Dick jumps into his arms and crawls over his shoulders and drapes himself across his back and is like “dad! You're home!” and suddenly bruce feels better
Or Bruce excuses himself from a Gala, pissed off because someone whispered his kids are just charity cases he uses to get publicity and Cass slips into the room through a vent and hugs hims from behind murmuring, “its okay daddy. We know the truth.”
~alternatively~
The batkids calling bruce dad when they've had a bad day because they have to make conscious effort to call him bruce and when they are just exhausted and done its too much effort to not call him dad-
Jason storms into the manor, pissed off after finding a woman who took drugs and killed herself and left her daughter alone, and slumps onto the couch. Bruce notices and comes over with a cup of tea and one of jasons favorite books, presses a kiss to his forehead and covers him with a blanket and jason murmurs a quiet “thanks dad” before relaxing with his book
Or Tim has spent four consecutive days in the Cave, only surviving off of coffee and spite and Bruce finally snaps, grabbing him in a blanket and burritoing him and carrying him to his room and spoon feeding him alfred food and Tim is so exhausted he just mutters “thanks dad.” before falling asleep
Or Steph is out on patrol and she slips and her foot lands poorly and she screams in pain, hitting the ground, but in just a few seconds Batman is at her side, wrapping it for her and helping her to stand and as she sags against him she lets out a slightly pained, “thanks dad.” as he helps her to the batmobile.
Bruce: Tim, do you have something you want to say to Jason?
Tim(to Jason):...I'm sorry I called you a psychopath.
Bruce: And Jason, do you have something you'd like to say to Tim?
Jason(to Tim):...I'm sorry if I hurt your feelings when I called you a dumbass...I really thought you already knew.
"Jason Todd, buried alive in a coffin. Surprisingly enough, this isn't the first time. The difference is, this time it's due to a fear cocktail, coursing through my veins courtesy of the Scarecrow. Bruce always warned me that Scarecrow's hallucinations were vivid but this... it's exactly like it was the day I woke up in my own grave. But this time, I'm not a scared and confused kid, I'm the Red Hood."