I'd have to go with Batman '89 as my favourite live-action Batman film. It has that gothic quasi-vampire eeriness I love about Batman without the over-the-top Burtonness of Burton, the neon homoerotic camp of Schmacher, and the stifling realism of Nolan.
If I could go beyond live-action films, though, I'd go with the animated Mask of the Phantasm. It - along with the animated series, of course - captured Batman far better than any live-action film has thus far IMO.