I feel the same way, I never cared about any of them the way that I cared about the characters on Buffy, I was the rare viewer that didn't care that much for Wesley's arc even. Intellectually I can appreciate that it was well-done, but I always found darker Wesley too cold to really be drawn in by his struggles Idk. I did like Cordelia more than you did though, but then the writing for her character ended up all over the place halfway through the series