Dick Grayson/Nightwing: His favorite is Captain America. Dick looks to him as an inpiration and a role model. Every time he goes out, you better believe that he pretends he's on a mission with Captain America, in other words, he's a giant nerd for Cap.

Jason Todd/Red Hood: His favorite is Deadpool. Jason thinks he's utterly hilarious and loves the design for his mask. (Where do you think he got the inspiration from? Haha, I'm kidding, jeez.) One of the best days of his life was when you took him to see  the Deadpool movie.

Time Drake/Red Robin: His favorite is Rogue from the X-Men, and it's totally not because he has a crush on her. (But he totally does and won't admit it.)  Not only that, but he thinks her abilities are rather unique and loves to watch her grow as a character.

Damian Wayne/Robin: His favorite is The Vision. He isn't exactly sure why, the character just appeals to him. He's tried to find a way to make himself a being such as Vision to fight by his side, but Bruce shut him down before he could get too far.