Bruce Wayne is a total Batman fanboy. He has a made to life replica of his favorite Batmobile in his garage and a room set off to the side with all the Batman memorabilia he’s collected over the years. He’s known for spending crazy amounts of money at auctions for Batman stuff and orders his own versions of everything.
No one even bats an eye when he puts in a huge order for batarangs. And he’s so happy about it because when he’d first started out as Batman getting supplies had been the worst part of the job. He’d had a million hoops he had to go through to keep his secret identity a secret.
He’d thought he’d hated it when people became Batman obsessed, but after he got caught with a Batarang in his pocket at a charity event he decided to go with the fanboy persona. And it worked.
His children think it’s hilarious and buy him all kinds of weird Batman merchandise. Like the crappily painted Batman figures shipped from China, Batman soap, the plastic masks every store sells, and their personal favorite the pajamas that say “My Batcave is my happy place”