I suppose Batman Begins is my favorite. However, it has a couple of areas that keep it back from being my definitive Batman. Suit - I'm not crazy about it. For me, it's a little too crisp. The armor looks too much like armor. I prefer the Keaton suit. Bale - Not deep enough. He just comes across as a wealthy guy with a chip on his shoulder, not someone who is emotionally scarred.
As much as I dislike Burton (which is a lot), I think he got two things correct in 1989 - the the two things I mentioned above. The suit looks more like Batman to me and I think Keaton is much better in the role.
Batman & Batman Begins are the only two I own and I watch both with some regularity, depending on my mood.