I think it's the best OS I've used yet really. I remember getting BSOD many times on Windows XP and several times on Win 7 (although they were so rare they were the exception). Almost always those previous iterations had some peripheral that needed help being configured but with Win 10 I haven't had to touch almost anything.

My computer has changed to be not comparable to those previous though because I now have a nice GPU, a nice CPU, and a SSD. So any speed improvements, graphic improvements, etc are skewed by the hardware changes I've made since.

I didn't turn off anything except the privacy that I could. It's just that I don't have a use case for most of the features (yet).