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.
Guix does have great reproducability. The person I was replying to was recommending people use distrobox for software that isn’t packaged, I was saying that isn’t reproducible.
The very large majority of nixpkgs is built from source, but there are a few apps that can’t be built for whatever reason. This is still reproducible because it fetches a tagged version of the software and checks it against a hash.