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.
Whenever somebody recommends NixOS, I just want to spam the comments with Guix. I prefer configs I can understand, and I think lisp makes that easier. Other than syntax, the only thing I see is people complaining about the free-oftware-only. But the recently hyped distrobox solves that (together with the nonguix repo). Yet nobody recommends guix in all these “immutable” distro threads.
In my opinion Guix is the best mix of:
Arch (rolling release),
NixOS (“immutable”, atomic updates , rollback, reproducible, declarative configs)
Gentoo (source code based, write your own package definitions for any source code you find),
with some lispy syntax.