Because I have a mix of 32 and 64 bit installs (only one 32 bit left), and the fact that I have 4 distros on my UEFI machine, I use:
(distro_name)(32/64)(Display Environment)(CPU-abbreviation)
# hostname
siduction64kdefx
It may be a bit long, but it makes it easier when I'm looking at my routers DHCP client list.