I use Debian flavors for my daily drivers. I have no complaints, no real desire to switch it up on that front.
However, I am starting to get into self-hosting and homelab projects. I'd like to start test driving some light-weight distros of a different flavor.
I'd prefer a GUI be available, but the environment and WM is pretty inconsequential-- except it shouldn't be bloated. I'll install any additional apps I want, I don't need a curated mid-to-heavy-weight distro.
The plan is to make heavy use of Docker images, to try to maintain a clean and modular setup of services. If that makes any difference.
Suggestions? Any slim distros you're just gaga for?
Alpine Linux is often recommended in similar circumstances. I've never tried it so can't say how it is. Of course you could use Debian with a light WM.
I have some experience with Alpine, usually in the form of images for CI pipelines and other remote usecases. It never occurred to me to check it out as a locally installed option.
Use vanilla Debian. It is well suited for that purposes and it is great in terms of long time support: stable distro updates almost never break anything and upgrading to new release is possible and relatively simple. Don't listen to those recommending Arch or Fedora, upgrading them is a pain especially when you have to support many servers.
If you want something more lightweight, you may try Alpine. It is also a distro of choice for docker containers. However I'd prefer Debian for the host.
If you're going for a container/VM-first approach, you might be interested in Bluefin DX - it's an immutable distro based on Fedora Atomic, and follows a workflow revolving around containers and VMs. Basically tuned exactly for homelab users and developers, who're looking for a stable yet up-to-date base (unlike Debian, which tends to use outdated packages, unless you're on Sid). The biggest advantages of using an immutable distro is that you never have to worry about a broken update again - so you can just focus on your work.
Upgrading them should be done frequently since it's a rolling release distro. If you wait a long time and then do a large update, you may run into issues because they are not really designed for that. You should always be on the latest version of packages.
I don't know about slim but I love OpenSUSE. It is super stable, I've run it for about a billion years. You can use the installer to just choose the server light install.
I just recently moved my home server from truenas to RHEL. I already use Fedora on my laptop and the enterprise Linux space has incredible support. Something like Rocky could be perfect for you if you value stability and long term support
If you're willing to forgo the GUI installer requirement, take a look at Void Linux. Pretty slim base installation, very stable and conservative package updates for a rolling release. Excelllent package manager. Downside might be smaller package selection than Debian or Arch.