I've always found that weird, because I feel like Year One got passed over, even though it feels like an evolution on TDKR, the next step. The book goes to some dark places and sometimes it feels like the whole damn town is corrupt, but ultimately its a very hopeful, optimistic story about human comradeship and honesty. No grim gritty revenge fantasies and nihilism here.
And that's something I always really enjoyed about Morrison's Batman JLA run onward. He openly admitted to hating the worst excesses of post-86 Batman (a semi-unhinged, essentially humourless loner struggling with rage and guilt). His Batman isn't crazy; hell he's the most competent, utterly self-assured human on the planet. He doesn't get off on beating up crooks. Its not even about "vengeance"; when he tells Jezebel Jet he got over his parents death, I believe it. And I think by making this kind of high-tech Batman billionaire ninja detective that still recognizably human, he was able to play in so many styles. Frank Miller, Dick Sprang, Adam West, O'Neil/Adams, Finger; one wasn't more valid and "definitive" a Batman than the other, and I think that brought back a real sense of wonder to the character.