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.
Maybe use btrfs, which has reduplication and compression capabilities. I never tried it in Guix but it’s like magic.
I love btrfs. I’ve been using it as the root fs on all my linux installs for years; it’s great stuff.
I do wish RAID5 would get fixed. I’m also pretty excited to see how bcachefs pans out.