Batman - 5 years ago I would have probably said TDK, but Batman is just more rewatchable and fun.
The Dark Knight
Batman Begins
Batman Forever - at least it’s fun and I’m a little nostalgic to this, but it isn’t good by any means
The Dark Knight Rises - this went full Nolan and depressing and is almost an hour too long
Batman Returns - this went full Burton
Batman: The Movie - I guess…?
Batman & Robin - you can watch and “enjoy” this for being so bad and it’s almost better with the commentary, but still this is the lowest point for Batman