Kubuntu for the win if it is a desktop/workstation
sort of advanced for beginners -- Ubuntu (vanilla) or Mint for beginners
Ubuntu (vanilla) or Mint will run well on older hardware too -- something worth considering.
I have an old IBM/Lenovo X-61 laptop that gets along fine on 16.04LTS desktop GUI for light duty -- old 32 bit dual core Intel. Checking routers, inspecting website bugs for older units (8 years old now?) it uses IPV6 too
