Sorry, but installing arch linux doesn't mean you are some computer master. You are just following instruction on a wiki. Anyone could install arch linux if felt like, and wanted to put some time into it.
Some people make arch linux their personality especially the forum.
In addition to the other stuff mentioned, it's a rolling release which means you don't have to worry about upgrades/reinstalls of the OS as much. You also get access to the AUR which is probably the most complete repository of software on Linux.