OS means operating system, the thing that allows to get shit done. You don’t want this to be unique nor creative.

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Look at distrowatch.org.

Myself, I am using plain old Debian stable since about 17 years, after using SuSE and a bit of Ubuntu since 1998 or so.

I also use a bit of Arch and Guix when it comes handy.

So, I am a boring guy.

But back to your question: What du you want? What is your goal?

Guix, NixOS, Gentoo. Which situations do you mean?

I’ve used alpine and can confirm, it’s pretty fun and efficient.

I’ve even been thinking of trying to setup a super small work environment on it, a full Wayland desktop daily driver, like, using labwc, lxqt, foot terminal and Emacs making it into a terminal first workplace with the ability to exploit it’s computing efficiency to make use of the modern stack in stuff like web browsing when the terminal tooling doesn’t cut it.

My computer can run everything pretty well already, but a terminal first environment is the perfect training for me to get used to my new split keyboard layout, while also being a perfect excuse to go all in on my programming hobby by setting everything up in a container like environment such as alpine, additionally, the minimalism larp appeals a lot to me, it just feels right.

Unique? Personal favorite of mine: https://dyne.org/dynebolic/

Personally, my “I’m too lazy to build this from the ground up” daily driver is cachyos now…used to be Manjaro or Garuda, but I feel like cachy does the same stuff with less bloat.

When I feel picky and want to spend the time, void is my goto. Xbps is a fantastic package manager. Nix is worth running as a daily driver once (although guix sounds REAL interesting), but it’s not for folks who want to avoid a steep learning curve. If you want something more gentoo-flavored, sabayon is gentoo for the lazy (and it bundles a binary package manager for those who are impatient xD ).

I know one guy who daily drove tinycore for a while. Same with puppy Linux. I couldn’t get into beyond the occasional live boot.

I’ve been playing around with Alpine Linux lately which has been fun. Also if you haven’t used an immutable distro before, they’re quite different to play around with.

slackware?

i always liked Bunsenlabs, very nice minimalist setup. windowmaker live (wmlive) is also interesting, more in a retro direction.

For the opposite side of the spectrum: Garuda Linux Dragonized

It’s disappointing to see only one reply (so far) challenging your request. Why do you want a unique distro for day to day?

I’ve used a variety of unique distros simply to explore them, or for specific purposes which the OS uniquely fills. And it’s great that some non-unique OSs have workflows that change the ways a new user may be familiar with (e.g. tiling window managers). But I’ve ultimately had a great time picking a stable, popular daily driver and creatively customizing it to look and act unique and personalized.

GoboLinux. It does the software-as-directory thing, like MacOS.

Chimera is a general-purpose Linux-based OS born from unhappiness with the status quo. We aim to create a system that is simple, transparent, and easy to pick up, without having to give up practicality and a rich feature set.

https://chimera-linux.org/

Qubes OS

Debian.

It’s unique in that it is very stable while not being the shiny new thing changing things back and forth for no reason (looking at you, Canonical), it just works and is run by a non-commercial group of people, not a corp.

Redcore

https://redcorelinux.org/

No idea what your day to day is, or what you consider “unique and creative”, or why that would be selection criteria for an os though.