Generally, my preference would be for a Bruce Wayne in the Bronze Age mold, who's not only capable of healthy relationships but even makes wisecracks.
That said, I don't find Rucka's Bruce Wayne unlikeable. I think like many writers, he was inspired by Miller's work while also trying to make the case that DKR isn't the inevitable outcome. That Bruce can be a kinder, more compassionate human being, but he might have to be pushed to the logical conclusion of his worst tendencies before he can conquer them. And he and Brubaker did an excellent job of accomplishing that.
Given that Bruce had just gone through Knightfall/Knightquest/Knightsend/Contagion/Catacylsm/No Man's Land, I don't expect him to be at his best, and it's a testament to his character that he was able to work through his problems as quickly as he did (all things considered).