As long as it carries on working I don't care.
No seriously. I use Windowblinds and Start10 from Stardock. My system looks like Win 7 with the theme I use, I run Firefox with Classic theme restorer so cosmetically it doesn't *feel* like I'm running Win10.
I had problems updating my laptop to the anniversary update and rolled back, never been bothered by it again.
My Chuwu Hi10 tablet is on the AU with no problems but also with Start10.
My phone is Android and I actually find Cortana useful, it gives me notifications of missed calls and texts and lets me type a reply back without fishing the phone from my jacket pocket or wherever I recently forgot to put it down, rather like Google Now does but sometimes better, sometimes worse.
It's the internet, Microsoft & Google have my data already, I lock down my privacy settings on social media to only certain people and use adblock so I don't really care about ads or 'targetted' info.
For the record I also dual boot into Linux, I don't particularly care what O/S I'm using as long as it let's me do what I want to do