I’m going to be boring and pick the obvious one everyone is ignoring. Because as much as I’d love to say Dick, Pre-Flashpoint Babs, or Cass (and they’re 2, 3, and 4, respectively), I’m somebody who was indoctrinated with a steady diet of Adam West and Kevin Conroy (Rino Romano too, for that matter) from an early age. As cool as the rest of the Gotham City setting and characters are, none of it exists without Batman. He’s the source. He’s the center. And he is awesome. He’s someone who has been through a tragedy that, while severe, is also very simple and human, and he uses it as motivation to fight for what he believes in. He’s someone who always stands up for his ideals, no matter the cost. Whether or not you think his principles are a smart idea, he stands by them (Zack Snyder, Tim Burton, and the first, like, three issues he appeared in notwithstanding). While he was fortunate enough to have the resources to pursue his mission, he wasn’t chosen to become a hero by chance or by the actions of others. He’s just someone who uses what he has available to him to accomplish amazing things.
Now, I love Nightwing. He’s cool and charming and a great foil to the rest of the Bat-Family. I love Oracle. She occupies a unique role and has an amazingly compelling personal arc of conquering her demons and becoming stronger despite the pain and the scars. Also, she stars in the best series DC ever published, so there’s that. I love Cass. While she doesn’t have as extensive a history, I consider her a genuine kindred spirit to Bruce and I like her for a lot of the same reasons I do him. I love Tim. For a long time, he provided a much-needed, very human, down-to-earth perspective on the crazy world of Gotham City. Heck, I even love Azrael, crazy jerk that he is.
But I loved Batman first and I’ll always love him the most.