I love that show. Unfortunately I haven't seen it in a long time since I hadn't had cable for over a year. I don't think the animation sucked, though.
I think the favorite episode that I remember is when Norm McDonald played Death. Peter did something stupid to cause Death to sprain his ankle, and Peter had to perform Death's job for him. Hilarious!
The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents. ... The piecing together of dissociated knowledge will open up such terrifying vistas of reality, and of our frightful position therein, that we shall either go mad from the revelation or flee from the light into the peace and safety of a new dark age.
~ Howard Phillips Lovecraft