I'm not like so many who seem to have to rationalize their choice of Linux or other free software by pretending it's actually technically better than the proprietary for-profit stuff. It's not about that.
Linux could get 10% of the battery life of Windows, have zero games, no Netflix/whatever support, and be slow as hell--I'd still choose it over proprietary options out of principle.
I want to own my computer. I don't want my computer to spy on me. Microsoft is literally adversarial to its users (Apple and Google are, too, but Apple at least has slightly different incentives that might make them less bad). Why would I invite that negativity into my life? Life is hard enough without trying to fight against a trillion dollar company for my privacy when I don't have to. It's that simple for me: I'm not inviting a Trojan horse in. But, people act like I'm some tinfoil hat nutjob. I think everyone else is crazy for sacrificing their privacy for "but Windows has a game I like".
Apologies for the preaching, but I don't know how to explain my point of view without it sounding like that!