I've never really cared for Bruce's love life. I feel it's the least interesting part of his character whenever they try to being it up again. The closest he got, before Selina, was Vesper Fairchild, and she ended up dead.

I think the reason why I liked Sasha as a love interest is that she wasn't really a typical love interest. Their relationship was much more platonic and respect driven, rather than a full on desire for each other.

Another big difference with Sasha is that she moved onto bigger and better things, mainly becoming the Black Queen of Checkmate. Most of Bruce's other love interests don't really do that. I guess Zatanna and Talia are the only exceptions.

Even with Talia, she barely comes up anymore unless Ra's involved in the plot.