Arch Linux. Well, four years later it's again about Arch - more or less: Manjaro Linux. This distribution is based on Arch Linux, is completely binary compatible with it's ancestor but maintains it's own repositories.
During the last couple of years I mostly kept Debian based distros running on my laptop (still this one :-) ), sometimes Debian itself and sometimes Ubuntu. I did not have the time to go through the Arch Linux installation routine which - by my last post you might have guessed - can be a little daunting. However, I do think that Arch's "pacman" package manager and their build system is one of the finest out there. This is where Manjaro comes in handy: it provides a live system with a GUI installer which doesn't take more than 10 to 15 minutes and it's all done.