I find Firefly to be HIGHLY overrated.
Don't get me wrong, I love the show. I just do NOT think it is this amazing bastion of the ultimate tv quality ever. I think a lot of people have fallen in love with the mythology that has built up around the show. They've fallen in love with what the show could have been (But, and this is important, it never was).
It's still a good show, for what it was, most of the time, but it has it's share of badness which I think some people forget or forgive. But there's nothing wrong with that, we all overlook the blemishes of the things we love. It's what we can overlook that makes us fans or haters.
I just get so tired of the cult of Firefly sometimes, and wanted to ramble.