Laptop (x230)/Steambox+htpc(HP8300+GF1050): ElementaryOS - Looks nice, AppStore with native only-programs, Ubuntu underneath so I can find a lot of programs/information online in case of any problems, everything works mostly out-of-the-box
Desktop/Homeserver/VPS: VoidLinux + DWM(only on desktop ;)) - Simple (runit as init system, no default logging daemon [I'm using socklog on servers], LibreSSL), cutting edge and not bloated
Work: Ubuntu Mate LTS + ArchLinux in chroot - Ubuntu Mate - same reasons as with elementary on my laptop :)
ArchLinux in chroot - cutting edge, AUR with everything and because it's a chroot I can easily snapshot/share/move my development environment, lot of information/solutions out there
I also use:
Alpine - containers with weird things[LXC] on home server - small(almost nothing inside ;)), LibreSSL
Slitaz - old Pentium-M laptop without DMA(I don't know what happened - I got it for $0 so no questions asked), old P4 machine - perfect fit(and toy...) for those machines
LineageOS - no google inside, only f-droid