For the kind of messing about I do on my desktop and laptop at home, I really don't think Windows 10 is bad as an OS. The "spying" concerns me a little, but considering my usage consists of time on eBay, time browsing the net generally, the occasional YouTube trip, and occasional gaming, I don't think I'm going to worry myself unduly about the entire affair.
What worries me a little more is time spent on an unsupported OS. My Win 7 machines might have to be imaged, then upgraded, so that I qualify for the "free" upgrade and can immediately revert back. Saying that, I've had Win10 on my desktop for a while now and I've had no problems with it.