I'm a new Linux Mint user and i have to say. I've tried probably almost every distro out there (Arch, Gentoo, Debian, Fedora, Ubuntu, SuSe, CentOS and probably a few i'm forgetting) and Mint is BY FAR my favorite for many reasons.
First, It's currently very elegant and beautiful, more so than any other distro, and i rather like that.
Second, Most stuff that you would probably install as soon as you get the OS installed is already in. Codecs, DVD support, eye candy, useful mint-centric utilities, the right repos enabled, etc.
For those reasons, i think Mint is my favorite distro. I hope to not only use and enjoy it for hopefully the next few years, but i'll also try to become a part of the community asking questions on here and helping out wherever i can.