Off the top of my head, here are some of the ones inhabiting my brain:
- The original Bat-Man
- The rather sanitized, if kooky, Batman of the 1950s
- The "New Look" Batman of 1960s and 70s
- Adam West
- The dumbed down version from The Super Friends and assorted Saturday morning cartoons
- Frank Miller's Dark Knight
- Michael Keaton
- Bruce Timm's animated version
- The more-or-less current continuity Batman
In my case, the "New Look" and Keaton versions of Batman are the strongest, with the Dark Knight running a close third. Consequently, I think of Batman largely in terms of how he was depicted in the comics in the 1970s, with his Bruce Wayne persona largely informed by Keaton's performance. The Dark Knight angle just punches up his raw power a bit, so he's a little more willing to brawl than the karate expert I grew up with. That's who my Batman is.
And yet, I'm still able to keep all those Batmen separate in my head. I can sit and watch one of the cartoons or read through DC Free Comic Book Day offering and not get bothered by the fact that this Batman doesn't precisely match the one in my head. The closer he does come, of course, the more inclined I'll be to become engaged with the piece and enjoy it. The further from my version, the less likely I'll care.
I think it's a fascinating prospect, though, that I can juggle distinctly different versions of one character in my head and actively keep them all separate while at the same time amalgamating them into a sort of gestalt Batman.