Debian. Raw and basic. I certainly try other distros for fun, but my work box has Debian 13 but loaded from scratch, so to speak. That is, I net install the absolute basics giving just enough smarts to see the Internet and know that it is a just-born OS. Then I only load what I use, one utility at a time. (Actually a script auto-loads my list of stuff) Then, the radio is turned off (nmcli r wifi off) and I don't have to worry about some drive-by becoming active without notice. It is easy enough to turn the wifi back on again to get access to the world, but most of my use is single user (hobby) programming, controlling electronics that have nothing to do with the 'Net.
AI is on another tower on the local lan with a 20gb GPU and works well for coding, and is very basic Debian. Jan, Ollama, several local LLMs, and little else.
A little Nuc samba server connects me with the Macs.
Be a different setup if I was a web programmer.