Workstation:
Used to love gentoo, but it kept breaking on me.
Went Ubuntu until they went stupid, then arch for a while but again, breakage.
Debian works, I have to spend 0 energy on it, and I can layer on different vms and lxc for whatever other distros I want.
Server:
Was freebsd because it was perfect and jails were next level shit but people keep putting out software that was obnoxious to install without docker, so debian as hypervisor/zfs and freebsd for most apps, debian for the obnoxious ones. Perfect system.