Arch Linux is a lightweight and flexible Linux® distribution that tries to Keep It Simple. This Linux distribution is different from many popular distribiution becouse Arch is a rolling release distro. What that means ? well it’s preatty simple, you don’t have a major releases.. you have to install your OS and just keep it up to date. That is an awesome thing if you dont like to reinstall your computer every time when some major stuff happens. Arch is always up to date. Yes you have stable versions of kernel or software you like to use, also GUI or DE how ever you like to call it. Also awesome thing is that you can even install Unity if you like it. The awesome thing is, that you can install this os in a few ways, the hardest one is to follow Wiki install guide, also you can use some of the installers like aui. Maybe try one of the Arch Speciality distros like:
Tux Hat Linux
Or you can try out Arch-influenced distributions:
At the moment I use Arch linux installed from AUI, I have try many DE’s like KDE 4 and plasma 5, Xfce, cinnamon, Mate, LxQT, LXDE, FluxBox. For now I’m ok with LXDE and kernel 220.127.116.11 rc4. My first Distro that got me here to meet arch was Manjaro linux.
On this snapshot you can see LXDE Desktop environment with conky gotham theme and docky panel, also screenfetch show info
I houp this was helpful so you can try and choose what would you like to have installed.
All info that you need about Arch linux, can be found on Arch Wiki page.