I'm not sure what to recommend if somebody asks me for a newbie-friendly Linux distro.
Kubuntu, because KDE
is supar awesome once you've right-clicked everything and sight and dug through about 30 control panels to find the exact feature, effect & theme subset you want? Sounds a tad bewildering, I suppose.
Ubuntu, but you kinda have to ignore the default UI, sudo apt-get install gnome-shell & download roughly 15 extensions to make it spiffy? Again... a tad intimidating.
Mint? I guess that'd work. Codecs and drivers and all. But then you'd get something that acts like a sleeker Gnome 2 with a few more kinks... always found Gnome 2 boring. And that Nautilus thing... granted, newbie probably won't be looking for the ability to open a
.desktop file with gedit. (Seems a bit basic. Wasn't there when I needed it.)
Something not based on Ubuntu, possibly not even based on Debian? Then I'll be far less useful for troubleshooting. And I appreciate the momentum Ubuntu has. People package their stuff for it, or there's a PPA, etc....
Of course, that's a purely hypothetical question. Because noboby ever asks me about migrating to Linux. :p Ah, vanity...