For you when did the Simpsons start going downhill?

[Xannidel]

I find that they are still funny however they are sort of doing what South Park is doing which is using things in real life to influence their episodes.
I have no idea WHY they have these newer song people doing songs for them when they had all sorts of AWESOME people on the show before.
Also I miss Troy D:
I haven't watched the series in a loooooong time BUT I do remember the show back when I was like 14 or 15 and it was still pretty darn awesome. I just think the originality from the first 9 or 10 seasons has vanished and they need events that have happened somewhat recently to get a plot for an episode.