I have to admit that they were occasionally terrible friends to Buffy, but I can't hold it against them because I feel like all those moments were pretty clearly there to help generate TOTALLY UNNECESSARY additional Buffy relationship drama -- 'cos it was stuff like riding Buffy about not telling them Angel was back in season 3h, taking Riley's side in season 4 (and I say this as someone who actually really likes Riley, for the record), etc. But those bits always felt out of character to me, so I've mostly ignored them.

I find Xander and Anya cute, too, but agree that he had more chemistry with Cordy. And the immaturity made more sense in a high school relationship, too... (I like Anya as a character, individually, but her relationship with Xander is the least interesting thing about her to me, whereas Xander and Cordy played off each other nicely.