I don't think south park sucks now, it is slipping though.
last year for example was hit or miss, a few gems but most of the episodes werent as good as previous seasons.
dunno, its a toss up between hearing the same knock knock joke over and over (sp) or hearing it told to you slowly for 2 minutes (fg). that's almost all it is now. the shake weight episode? stupid. not because it wasn't clever, but it was less and less clever after the first seventeen times they told the joke.
and the worst part about south park is they had an episode making fun of george lucas and speilburg for updating all their shit with new effects, and then mockingly said they were going to do the same with their first episode. and their 100th episode or whatever that 2 parter with the giant barbara streisand they negated their own point!
both episodes are like listening to spoiled brats piss and moan with a few jokes thrown in, but i think family guy has done a slightly better job at least making the episode environment somewhat enjoyable (the only major exception is the missing cleveland and the dumb fucking brian/quagmire fued).
for all people everywhere, i have a proposition. a tv show can only be allowed to have 10 seasons. then they have to move on to other things. instead of wearing out characters and ruining a good thing, they take all the jokes and apply them to better uses.
try it. take any show you enjoy and try to find any awesome episodes that couldn't have been made into a different show after the 10th season. seinfeld, the simpsons, south park, king of queens, that 70s show, etc. they all should or did end at 10 seasons. just food for thought