I like 10 myself, it's pretty ok to use. From an usability POV it's miles ahead of 8 or 8.1. But the information gathering is a bit worrying, not that I really care about what they gather, and a lot of the information is mainly used to improve the software through analyzing it. But the fact that it can't be turned off is not good. 7 is pretty nice to use, and it's mostly stable. I know a lot of people who didn't want to upgrade to 7 from xp either, but at some point using the outdated OS becomes more of an risk than using the newer version, even though it spies on you a bit.