Fully understand your PoV, WM, which was exactly how I felt when they began to roll it out, but, like Rodo, we acquired a new laptop with it pre-loaded, so we have had to use it and have now got used to it, so I didn't eventually have any major qualms about taking the plunge and updating my PC. I wouldn't say I particularly rave over it, but it does what I need it to do quite efficiently, and the games apps are very good.
Where MS have put people's backs up is the constant and intrusive push to upgrade, and don't ever think the hectoring stops when you do install W10 ...... It's constantly bickering at me to do this 'n that but I've found that if you ignore it, it'll subside muttering back in its corner for two or three days before it starts up again.
I do agree that there are ongoing concerns over MS's intrusiveness via W10, and I wonder where the "Big Brother" effect will eventually lead us .....