definitely エンジェル as a puppet (sooo cute!) Spike (the whole season, 愛 it when he tries to annoy our Champ!) Wesley and フレッド getting drunk in "Life of the Party"
When Spike comes back as a ghost from season07 in BTvS after he destroys Sunnydale and pretty much haunts angel. And when they are headed to visit buffy out of the country, there fights are pretty hilarious