1966 Batman. This was always the version of Batman I liked the most. Just more fun. Phantasm is a great movie too though.
http://en.m.wikipedia.org/wiki/Batman_%281966_film%29
The Dark Knight is my all time favorite Batman movie. I loved that series and the two that Michael Keaton did, Batman and Batman Returns (that was the one Danny Devito was in (more importantly Michelle Pfeifer played Catwoman in that sexy latex outfit)).
+1 to Batman Returns! Loved Danny Devito and Michelle Pheiffer, and let's not forget Christopher Walken. I'm a fan of Tim Burton films, and this was the best Batman, up until the Dark Knight with Heath Ledger.