Season 9 was the beginning of the end, when they started to butcher the shows characters. Harry Shearer who does many voices, has stated he felt the fans were cheated when they decided to make principal skinner a fraud, after that they continued to butcher skinner and many other characters. Skinner went from a deeply disturbed Vietnam vet to complete mammas boy. Moe went from being a scumbag to this suicidal wimp. Homer went from a decent family man to be completely egocentric. Barney became a recovering alcoholic. This goes on and on. Oh well I just ignore all that.Yep, and for some reason just knowing that after around series 12 has been crap seems to partially tarnish the re-watchability of the good ones