Arch rules. It is literally just what I wanted from a Linux distro: the dead simplicity and austere Unix-ness of Slackware combined with the up-to-the-minute-ness and easy source package integration of Gentoo. A true gem and reminder of what Linux is and can be, when Ubuntu makes it seem like we've lost our way...
Ubuntu is the best distro around... for what it's purpose is. Ubuntu isn't around to cater to power users, the whole idea behind it is shipping a distro thats so easy your grandma can install and use it.
When I switched my parents over to Linux, I installed Mint, not Ubuntu. This was well before the Unity debacle, but even besides that, I'm glad I did. Mint looked familiar to them (coming from Windows), and while it may be heavily bloated from a software perspective (the stuff that makes Arch users cringe, since they ship everything by default to maximize configuration-free compatibility), it feels very lightweight from a user perspective - like what Windows might be like if they stripped out all of the stuff that people really don't care about.