Dwayne I agree, that'd be cool. As I look at it, I just see various "Eras" in Muppet History, such as "Early Years" "Prime Time" "Post Henson" "Re-Emerging" (just based on my opinion). If you look at it, you can track it with certain characters gaining and/or losing popularity or prominence through the years. It's actually quite fascinating to look at the franchise as a whole and see how it's evolved and changed over 60+ years!
I was even talking to a co-worker about this and said that if I were to teach a Muppet class, I would have an essay question about identifying the factors that led to the major character shake-up in the 90s (Jim and Richard's deaths, and Frank's noticeably reduced presence)
I think it's one thing to have certain shows/movies/etc that we like better than others, but as a whole, I think ALL Muppet media is worth watching. For example, I would rather watch The Muppet Show instead of Muppets Tonight, but I think both shows are good and both are worth watching. As long as the Muppets are around, I'll be watching!