I'm a 31 year old guy. Most of my friends are also guys around the same age. I think it's pretty awesome that anytime I bring up the fact that I want to see The Muppet Movie (with a hint of shame in my voice) They always respond with "Hell Yeah! I can't wait!" They then start listing their favorite muppets that they hope get some good screen time. (Mine are Beaker, The Swedish Chef and the entire Electric Mayhem Band)
Nobody is too cool/old/manly for the muppets. And that's pretty amazing. There are not many things that people across the board never outgrow. It's fun when something like that comes along. It almost makes me think humanity has a chance. Almost.