EndeavorOS. Because I wanted to have a rolling release distribution that is always up to date, and one that is good supported by maintainers and community. Good documentation is very important to me. And I trust the team behind EndeavorOS and Archlinux.
Also the manual approach of many things and the package manager based on Archlinux is very nice. I also like the building of custom packages that is then installed with the package manager (basically my own AUR package). The focus on terminal stuff without too much bloat by default is also a huge plus.