Barbara and Steph love Black Canary, just slightly differently. Barbara just knows Dinah is the best, and there’s no other option, but Steph? That there is her icon. Black Canary is her role model, her hopes and dreams. Barbara is the good best friend type, but Steph is on some Tim Drake level stalker shit.
Dick is a hardcore Superman fan. As a smol bean he had only Superman merch, he even had one of those costumes with the blow up muscles, much to Bruce’s distress. The boy in blue will always have Dick as his number one fanboy.
Bruce idolizes Wonder Woman, and no one can say otherwise. It started as a joke with Diana but now he wears the knee high socks with the little capes on the end under his suits and all WE employees have learned not to question it. Besides, the Amazon is a strong independent woman who is too pure for the world, they can’t judge because they’re all enamoured with her too.
Jason is on a similar boat to Bruce, but he’s legally dead so not many people see him decked out in his fan wear. He has the tiara and will proudly wear it out with no shame whatsoever.
Cassandra, surprisingly, likes the Flash. He’s basically the opposite of her, speaks much too fast, and far from refrained, but they both have the same issues; communication takes conscious effort and they both hold so much power. He’s also so pure, how could anyone not love him?
Now Tim always changes his favourite hero, basically every other week, so it’s hard to pin down. Past favourites include Batman, Superman, Wonder Woman, Green Lantern, Black Canary, Flash, Aquaman, and the likes.
Damian is a Nightwing fan, but don’t tell Dick. He has action figures of his brother hidden in the back of his closet. And boy does he know about the Discowing suit. Dick did not live that one down. Still hasn’t.
Duke is too sweet to outright say so, but he likes Green Lantern. Has been known to wear a Green Lantern Corps ring to school. Also may or may not have pajamas with the symbols.
Alfred will always say Batman, but Robin and Batgirl will always hold a special place in his heart.