Personally, I'm a big fan of their short-lived 1980-1981 logo. I realize it has no place among today's clean, "Metro" look, but I love Metal and this just speaks to me. :)
It's not just metal. It's full of "tech" and "science" and "future" and "enthusiasm" and even "fun".
Re-adopting the 1980-1981 logo would send a signal that I would love to hear. That Microsoft is rebooting Microsoft and that things are going to be new and fun again.
I totally agree. Honestly MS really needs this sort of overhaul if they want to remain competitive down the road. They still have a pretty good hold on enterprise IT (slipping with the cloud) but I personally think they are in a bad position in just about every other market.
Though I've never had much love for Redmond despite using their products for 20+ years, since they feel like an underdog now I instinctively want to cheer for them. But, like someone said in another post, they sure make it difficult.