Re: Buffy the Vampire Slayer, we (still) ship it all, kind of like Sarah Michelle Gellar, who made an appearance on Watch What Happens Live with Andy Cohen to play a contemplative game of "Shag, Marry, Kill" with her former costars.
"Marry Angel, can you really marry the undead?" Gellar asked. "Marry Angel, you shag Spike, obviously, and I don't want to kill Xander though."
When Cohen pressed her to pick a definitive murder victim, she remained steadfast, replying "I don't have to! You can't make me!"
Indecision: the real OTP. Watch the interview here.