It's weird, every time Beavis and Butthead comes back, I watch the first few new episodes and laugh harder than I've laughed in years, then within a few weeks I completely forget about it altogether.
It's like the funniest thing in the world in short bursts, but I never make it through the whole season. It's probably best as an annual or semi-annual tv movie or something like that where they mock a ton of modern music videos and MTV shows in between some new shorts.