Arch is customizable, simple (in the sense that there are no surprises; things work as expected), and has a great community. Folks here can argue about snaps or flatpaks, and I can happily use AUR to install nearly anything. If it’s not there, I can publish it.
I’m not forced to adopt whatever GUI Canonical thinks is best for me in a given year or whatever their trendy new craze is. I can enjoy i3, tmux, vim, and ignore the rest.