Christian Bale for sure. Certainly it has a lot to do with the writing; in Nolan's films we get to truly see the man behind the mask, and never before we got to see him so much like a real man, and that makes him even meer heroic. But I think Bale has a quality about him, of being so methodical, of being so extreme in his characterizations, that adds a lot to the character. I find hard to think I'll ever like another Batman as I liked him. In fact, I think he's the only Bruce Wayne I like. The others were just guys that happened to dress like Batman and fight insane villains.
I think, Christian Bale's Bruce is the best! Christian showed the real Bruce Wayne, his inner fight, his feelings... He was born to play Bruce Wayne/Batman:)
My favoriete Bruce Wayne is the one from The Batman. I like his incarnation because he's a meer fun loving different personality and can hide it when he's Batman from everyone except his friends.