I voted for the 1966 series, it introduced me to the characters and I remember it fondly.
I watched the Burton movies and liked them but not as much as the series.
The Nolan movies are good movies but I don't like Bale's Batman, it's the voice, I have no idea what Bale was thinking, it sounds ridiculous. I also think that the look of Nolan's films is forgettable, Gotham for example, it's so realistic that it becomes just another generic city.
As I said, good movies but not batmanny enough to be my favourite Batman.