The 98' Bruce Timm and Paul Dini Batman, easy. The entirety of the DCAU is smart, funny, actiony, well-written, and true to the original characters without being afraid to experiment a little. I'm going with 98' specifically because I feel that they were really in their stride at this point in writing Batman. Justice League is just so. damn. well. done. It might be my favorite t.v. show.
Honestly, while I like the Chris Nolan movies, and attempt to "do" Batman after BTAS, Batman Beyond, and Justice League/JLU just seems to fall short for me.
Some of the early BTAS episodes haven't quite realized how to tell a Batman story in the style they were going for yet, though.
Joke answer: The Batmanga version:
God, Batman: The Brave and the Bold is a good series.