season 6 is my favorite Buffy season, SO THERE. I even sort of like season 7.
I thought Angel seasons 4 and 5 were both disappointing in different ways. the overall arc in season 4 was interesting and well done, but on an episode by episode, scene by scene, moment to moment basis there was a lot of blah, especially in the middle. season 5 was the opposite, there were a lot of entertaining individual scenes and episodes but the overall arc was just a lot of "wtf was that all about", Big Themes that got constantly TALKED about but not really dramatized convincingly, and threads that went nowhere. the finale was cool but they did an even worse job than Buffy season 7 in building up to it.