For me it’s PeppermintOS.
I started my Linux adventure a few years ago, and haven’t owned a Windows PC since.
I currently use Arch on my main rig, and I wanted to install Linux on two old laptops that I found laying around in my house
I then remembered the first distro I ever used, which is PeppermintOS, and I was amazed at the latest updates they released.
They even have a mini ISO now to do a net-install with no bloat, with a Debian or Devuan base.
Sadly, I believe the founder passed away a few years ago, which is why I was really happy to see the continuation of this amazing project.
Linux libre distros deserve as little recognition as possible. They prevent critical CPU security updates and fixes (I.E igpu leak) and suppress warnings that you are running outdated microcode, leaving you potentially vulnerable to exploits such as meltdown
As new vulnerabilities are discovered, my motherboard manufacturer issues new firmware versions with updated microcode, hence I do not need to install microcode updates from the operating system.