It's been a year since I've started using Linux as my main operating system. I remember a time when I thought I couldn't use a PC without Windows, but now I can honestly say I don't miss it at all.
I mostly switched out of curiosity. I've used Linux before in VMs and on real hardware, but I was wondering how it would work as my main OS, since those previous times I've only used it for a week at most and then boot back into Windows.
Another reason is the lack of control in Windows 10. I'm sure most have heard of the automatic updates and the general lack of privacy, but suffice it to say I was disappointed. I was hoping Microsoft would learn from the mistakes they made with Windows 8, but apparently not.
One thing I like about Linux is the superior she'll compared to Windows. Bash BLOWS the Command Prompt and even PowerShell out of the water. The CLI interface of Linux is easily of of its biggest strengths.
I also really appreciate the vast selection of desktop environments and window managers that are available. Each cater to different kinds of users, meaning one can use a desktop that works best with their workflow instead of changing it to fit a certain paradigm like in Windows. KDE Plasma is especially my favourite since I like the vast customization options and the Breeze theme.
Like anything in the world, it's not perfect, and I wouldn't call it near perfect either.
Screen tearing is a major problem. Wayland is a promising technology that solves this pretty well, but support is in progress for many DEs. GNOME only fully supported it this year, Plasma support is still a work in progress, and MATE and XFCE don't seem to be supporting it anytime soon. So I end up having to use either a DE with a good compositor or use Compton if the former isn't an option. I wouldn't mind Compton it it didn't introduce various desktop glitches of its own.
Switching to Linux has been one of the best decisions I've made. I really enjoy using it and am confident I'll be using it for the foreseeable future.
Happy New Years!