I download most distros for the installfest and install many in a vm just
to test and get a feel of how it  works. I do think all current distros are
have a reason to exist or their would be no development or users.
Distrowatch has a list of discontinued distros. I spend some time on
criagslist linux forum and there are a lot of open suse user that are hard
core server desktop users.
  I have tested many distros but still end up back at ubuntu 12.04 and
14.04 on my desktop and servers and one debian with many desktop managers
and still think that linux is a kernel and some programs around it and
ubuntu has good support for new users otherwize use what you want or like
-- 
Todd Cole
Ubuntu Arizona Team
4605 S PRIEST DR LOT 3
TEMPE AZ  85282-6507
toddc@azloco.com
602-677-9402