I say the 2009 period until Undertaker came in and ruined it all. This was supposed to be a time when the roster was very thin, with the likes of Punk who was essentially seen as a mid carder, Jeff Hardy who wasn't proven yet and the show sort of being carried by Edge, who then quickly got injured. A lot of guys really stepped up especially Hardy and Punk and they put on one of the great fueds, which headlined summerslam don't forget. Since then Smackdown has sucked
2002, 2003, and 2009 were the best. Me being born in 1999 only pretty much remember 2009 and with Punk, Hardy, Edge, and Taker on every week I looked forward to smackdown more than Raw. But now I can barley stand any of them.