Been a while since I explained about it, so perhaps someone is interested.
zel comes from varios sources, but basically, it comes from Zelgadis Graywords, a character from the anime "Slayers" (look for it, it's cool to watch if you like fantasy-action-humor anime). But also zel has certain relation to Zelda, one of the games that introduced me into the world of RPG. Additionally, when I was working with RPG Maker, the main character of my project was called Zelard.
As you can see, there are many reasons as why I like being zel.
About the addition to my nickname, it's just because I wanted to change it but keeping the original name at the same time. Besides, I was looking for a way to say that I've grown a little in this place, and I'm not too techy but I think that a techy name looks cool :)