GNU Guix System, for the following reasons:

• User-level management of packages, i.e. each user has their own profile which contains their own installed packages, which is separate from the set of system packages. i.e. no need to be root to un/install packages

• Commitment to GNU Free System Distribution Guidelines, meaning no proprietary software, proprietary kernel bits, or promotion of such - which I’m aware some see as a negative but I specifically purchased Linux-libre compatible hardware for this reason.

• Source-based package manager with an option for retrieving pre-built packages (“substitutes”) from build servers. Any Guix machine can become a build server.

• Packages can be built from a specified git revision, or with a specified patch, etc.

• A package is just a variable defined in Guile Scheme. A package repository (“channel”) is just a git repo containing a collection of packages.

• Declarative configuration of system i.e. kernel, packages, services, users, etc.

• Un/installs are atomic transactions, they create new generations of profiles that can be rolled back. Same goes for system configurations. Each system “reconfiguration” actually creates a new entry in the bootloader so if it breaks you can boot into the previous system generation and manage it.

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I have been using Debian for almost 20 yrs. In all that time I have tried many many distros and have yet to find one that I liked as well as Debian. Apt is just great. The number of packages available is awesome. It works on more hardware than other distros.

Pop!_OS

Its the most straightforward and causes the least amount of headaches for me

I use Ubuntu mostly, I just don’t like the snaps.

Manjaro, because i don’t like to deal with vanilla Arch

I use Windows😅

Fedora rawhide on laptop and Fedora 34 on PC. All witch Gnome.