For desktop computers, either Windows or Linux. Windows on my main computer since I rely on so much Windows-only software (MS Office, Many Games) despite the BS that Microsoft does to windows in new versions, but Linux has gotten way better lately, especially as it picks up new users as Windows declines. MacOS to me the worst of both worlds when it comes to lack of software support and corporate BS
For Mobile, definitely Android. Android is what I wish Linux was for Desktop computers; Loads of software you can get from many places, open source, and not locked down. It’s mainly the way it is because for Mobile OS’s, Microsoft was spending too much resources shooting itself in the foot with the Zune than to make the necessary improvements to make Windows Mobile to be competitive, and by the time they realized their mistake it was too late. iOS is such a pain in the ass for me to use due to how locked down it is, and while it has more software support than MacOS, its locked down nature and being mostly restricted to getting software from Apple means that several apps that I rely on (including a few apps not on the Google Play store) will never be available for iOS. I also like to see where every single file on my phone actually is
I’m on Windows. It’s the only OS I use that I know will run anything that I have on my machine without having to extensively grind myself down into researching or patching to make work.
I’ve at times thought about going Linux but I’m always facing the same set of problems before making the jump. That is, how much of my utilities, tools, and software that I use on Windows will work on Linux without using Wine or having to ditch it? How many of my games that I have that will run on Linux? I mean, I love Diablo II for example and Blizzard won’t ever make the Blizzard.net client for Linux. So there goes that option, just for example’s sake.
To me it’s just not worth the switch. A lot of people usually hop on Linux for cheap clout while making exaggerated claims about how Windows is declining as if they’re losing millions of users a day, which simply isn’t true.
But Linux, least for desktop users and not addressing it’s capability to be a good tool for server/programming uses, doesn’t have an awful lot to offer and your options are limited. That limit is tied to how many software developers in general, who care at all about Linux to develop for it when they know it might be easier for Windows for users to just simply run it.
Can’t speak to your other software, but battle.net and diablo 2 run great on Linux via WINE/Proton