History behind usernames? Hm, might as well give this a try XD
My username, WolfDragonPlasma, was a name that I first began using over 6 years ago, when I first started playing Subeta because Neopets was starting to take turns for the worse, and Subeta had a greater pet variety (or at least pets that made me want to hoard them all, unlike Neopets where there was maybe two or three, and then there's the Draik...). The username itself was made sort of on the fly with some thought put into it; WolfDragon came from my love for wolves and dragons alike, and then Plasma was sort of just tacked onto the end just to make it unique (because there are so many people with Wolfdragon as their names already D:)
But anyway, once I started dressing up my avatar over there with Kumos things, I began drawing what might this character look like had she been real, and I came to love the results.
Since then, WolfDragonPlasma, along with a few variations of that, has been my internet name, and I don't think I've used anything completely different since O_o