lol ok let me see if I understand this correctly are you asking me which I like best of the following couples: Buffy & Angel, Cordelia & Angel, and Spike & Buffy right? If im right in this assumption I have this to say:
I had a crush on Buffy during season 1 & 2 so it took me a while to come around on the Buffy/Angel relationship but I thought it was really well written and I came around to it after Angel left Sunnydale... 🙂lol
The whole Cordelia/Angel thing kind of took me by surprise (even though Cordelia did all that flirting with Angel back when they were on Buffy) and I kind of didn't like it I felt Angel betrayed Buffy when he fell for a girl that Buffy never really liked.
And for the Buffy/Spike relationship I went along for the ride because I more or less understood why Buffy was doing it but I didn't really like it until Chosen when Buffy tells Spike she loved him and he responds no you dont but thank you, or something like that. At that moment I thought the whole dysfunctional codependence of their releation ship was really beautiful...
And after all that being said I'm a Buffy/Riley guy myself 🙂 hope that helps.