Personally, I use Windows 8.1 (for some games) and Xubuntu on my desktop and Manjaro Linux on my laptop. I prefer to stick with open source operating systems as, especially linux in particular, are designed with security in mind.
Of course, there remains the issue of binary blobs, but that is the price of hardware compatibility.
Regardless, what operating system do you use? It is okay, if you aren’t a Linux enthusiast or if you need/prefer Windows or Mac.