Ubuntu is normally the go to distro. However recently Linux mint (very much ubuntu/debian based) has surfaced as a good user friendly OS. That being said, there is a little known flavor called Zorin OS, which is targeted for the big OS move from Windows to Linux. Happy hunting.
obarthelemy writes "Having at last gotten Linux to run satisfactorily on my own PCs, I'd now like to start transitioning friends and family from XP to Linux instead of Windows 7. The catch is that these guys don't understand or care much about computers, so the transition has to be as seamless and painless as possible. Actually, they won't care for new things; even the upcoming upgrade to Windows 7 would be a pain and a bother, which is a great opportunity for Linux. I'm not too concerned about software (most of them only need browser, IM, VLC, mail and a Powerpoint viewer for all those fascinating attachments). What I'm concerned about is OS look-and-feel and interface — system bar on the bottom with clock, trash, info on the right, menu on the left, menu items similar to those of Windows. Is it better to shoot for a very targeted distro? Which would you recommend? Are there themes/skins for mainstream distributions instead? I've been looking around the web, and it's hard to gauge which distros are well-done and reasonably active."