Fod, to whom I defer re all things Connor, has an entire treatise on the humans in Quor'toth. I'll let her spell it all out sometime.

I dunno about Gwen. I think she was just one of many failed attempts to het Angel up. But unless it was a short blonde ala Buffy or Darla, or had a dick ala every male in the verse, DB just didn't have the chemistry with 'em. So they went the way of that Asian chick, and Kate, and Cordelia, and...