Love this episode for many reasons, but mostly because of Faith's breakdown in Angel's arms in the end.
Their fight in the alley was so hot and heated, with Faith so angry, and Angel trying to keep her at bay. But when she finally snapped and asked Angel to kill her, because she was evil, I thought that was one of the most emotional scenes of either show. To realize that everything Faith had done up until that moment she'd done to anger Angel enough to kill her. Suicide by PtB Champion.
This scene always makes me wonder just when Faith finally found her senses. Was it in the church in Sunnydale, when Buffy swapped their bodies back? The train to LA? Before? After? I've always wanted to know. We know Angel helped Faith to save her from herself, but did Buffy put her on the path?