Nothing against Anya or Tara; they’re both great girls and I hope the X-man and Will, respectively, have long, happy affairs with them, respectively.
But it seems obvious to me that in the fulness of time, Xander and Willow were meant to be together, and will be.
When did I realize this? Well, of course, it was during the episode “The Replacement,” when Xander did the Snoopy dance to prove to Willow he was really Xander.
Who’s with me on this? Who disagrees? Bring it on!