As MarinT stated above, Linux Mint is a great OS for current Linux users, meets the needs of newbies & seasoned pros alike, and doesn't require a powerhouse computer to run.
I especially recommend it to those who were/still are looking to get off of XP or Windows altogether, and say goodbye to endless EULA's, piggybacking toolbars & other bundled software that's often borderline malware. No activation, and for 64 bit users, there's over 70,000 mostly 100% Free software choices to use.
For those who needs some Windows software such as Skype, we have it! Need to port MS Office over? No problem, WINE can handle it, though there's always a security risk with this. For 99% of home users who needs Office a few times a year, LibreOffice comes with Mint (& many other Linux distros) & more than meets the need, w/out the security issues of MS Office.
Linux Mint also has a Windows type feel, especially for those used to running Windows 7 or below. For those who loves the Windows 8 way, then I suggest Ubuntu, Unity & the former Metro UI has a lot in common.
Ubuntu MATE is also a worthy consideration, for long time Ubuntu users who deported due to Unity, it's a welcome back home. I've been monitoring Ubuntu MATE on DistroWatch & progress has been steady, it's now ranked at #26, way ahead of #74 a year back. This distro will likely break into the upper teens in the coming months & the sky is the limit.
No wonder Canonical made Ubuntu MATE an 'official' Ubuntu version, the initial release wasn't.