I read this yesterday, and though definitely biased towards Win7 some points do hit home (not specifically aimed at gaming, but it's a good read).
There's an interesting bit about how to get it free if Jim refuses your request (not tried it myself, so no idea if it works).
Quote:
Free upgrade to Windows 10 after July 29, 2016
How to save money and upgrade to Windows 10 for free after the free upgrade offer expires? Activate any assistive technology in your Windows 7/8.1, for instance, click + U and enable the onscreen keyboard and follow this link. I've just saved you up to $199.
I've been using 10 for a while now and I've not had any problems with gaming, though when I tried upgrading my wife's PC the ageing GPU wasn't detected and AMD don't provide legacy Win10 drivers so she was stuck with a weird non-native resolution for her monitor meaning I had to roll her back to Win7. I realise that's a pretty specific problem, but maybe something to be aware of if you're using some old kit.
Thing with Pro is that you used to be able to turn off a lot of the annoying shit via group policy, but then MS blocked a lot of this in the anniversary update as they want businesses to use the more expensive Enterprise.
Interestingly enough, I'm a contractor at one of the biggest companies in the world, and we've recently started rolling out Windows 10 Pro, so I guess they've found adequate way to suppress the nasties. For me, it's the forced updating which is the main reason I've not put 10 on any of my PCs. Well, that and MS's frankly appalling attitude of trying to ram it down everyone's throats last year.
It would appear yes, but does of course involve paying MS some money.
Personally, I'd Jim it, but then I'm pretty disgusted with how MS have approached the whole ram-Windows-10-down-your-throat mess, so currently I'd rather clean out a septic tank with a toothbrush than give Microsoft some of my money, but hey-ho!
Can't remember the source, but apparently there's a way to download a legit free 10 from MS if you go in through some kind of special accessibility portal/page. So you get a free accessible version which you can then tweak to run like regular version.
It's the "Accessibility" edition or whatever it's called, pretty easy to find - but that's for upgrading from 7 or 8 to 10, not for going from Home to Pro editions, that's normally a paid-for extra.
+ U and enable the onscreen keyboard and follow