I’ve written a microkernel for an embedded device before and enjoy that kind of thing. I haven’t had to use any of my kernel experience in the year or so I’ve been on linux.

My linux install (Fedora) took a while because I was reading up on a bunch of the options instead of just taking the defaults. Ended up mostly just using the defaults and the ones I did change, I kinda regret because the snapshots that I wanted to save disk space by avoiding would probably come in handy if I break something and don’t know how to fix it.