I didn't really get into custom kernels until I started using Crux. A few years after I started using Arch I got sick of the rolling release and Arch's constant breakages, so I started looking into the alternatives, that brought me to Crux (which Arch was based off of) and Slackware (which was philosophically the opposite of Arch without sacrificing the base understanding of the OS). Crux would have probably won out over Slackware if it were not for the switch to 64bit, when confronted with having to recompile everything, I went with the path of least resistance. Crux is what taught me to compile a kernel, in my Arch days I was lucky when it came to hardware and only had to change a few things in the config which the Arch wiki guided me through.

Crux is a great distro for anyone ok with a source distro and I think it might be the best source distro, unlike the more common source distros, it does not do most of the work for you. Also love its influence from BSD, which came in very handy when I started to explore the BSDs and FreeBSD which is my fallback for when Patrick dies or steps back, Crux deserves more attention.