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.
Specifically, Arch's software packages are much more up-to-date than Debian's. Debian has a much stronger focus on stability.
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I do debian stable for stability + security but I use a series of debootstrap chroots in testing or even sid specifically for gaming and the like. I find it the best of both worlds.
ROLLING DISTRO, BAYBEE :party-parrot: