I am spending an inordinate amount of time on my homelab (and the todo list does not seem to get any smaller). But on the other hand this activity gives me a ton of experience that I could not get doing $DAYJOB, and this experience comes extremely handy from time to time.
All of my stuff is public-facing and needs more reliability than I can provide via home internet, so I have a rented 1U in a datacenter. Proxmoxing my way through about 20 Wordpress sites, mail infrastructure to handle 100k messages a month for a couple of organizations, Gitlab (would have preferred Youtrack!), Nextcloud, FreshRSS, Mautic, Bookstack, Nextcloud, etc. Really want to dive into Minio on another machine for backup storage.
EDIT: See what I did in that last sentence? More tinkering! Argh!