Why are you using your choice of an operating system (= Mageia Linux)?
The short answer is that Mageia is what I’m used to, what I like, and what I’m most comfortable with, and that I find the community of contributors and users friendly and helpful, so that is what I’m staying with for now.
My original motivation for trying out Mandrake Linux (which later was renamed as “Mandriva Linux” and was even later forked into Mageia), was that I bought a 40 GB hard-disk (which was a large capacity for its time) and sought a distribution to install on it, that supported ReiserFS which was a file system that had journaling, so I won't have to spend a lot of time in running “ext2.fsck”. Eventually, it turned out that ReiserFS caused my hard disk to become faulty (and had no way to gracefully handle bad blocks) but in the meanwhile I grew to like Mandriva and used it and later its Mageia fork since.
That put aside, I still willingly try to help people, who are using other Linux distributions, or even non-Linux operating systems, with their technical problems. Part of my motivation is this quote from “The Cathedral and the Bazaar”.