Well, that's one helluva story.My avatar originated after I had just watched one of the new Iron Man movies (Iron Man [the first in the new series]. Interestingly, I happened to see it a day before it actually came out, but that's a story for another day.).
I've always been a huge Iron Man fan, but this movie was so awesome that it just intensified my love for Iron Man (and Robert Downey Junior). I was so obsessed at the time that I decided to make my MC skin dedicated to Iron Man.
There was obviously a lot of Iron Man skins out there, so I decided to take it differently. Instead of making it a Iron Man skin, what if I just made it a Tony Stark skin? That's what I did:
The assortment of blue pixels in the center being his ARC core.
After that, I didn't see much point in changing my MC avatar, so it stayed that way. But, when I got my youtube channel, I decided I needed a more distinctive logo than the Portal Logo I had previously been using. The only thing I had that was really specific to me was the ARC core. So, I took those 16 pixels and used them as my logo. For everything. The end.
For me, it's not the story of the avatar that is interesting, it's the name.
So, the creation of this name starts when I created the name enderslayer96. Don't bother asking about that, it's a helluva long story. So, after I watched that episode of Doctor Who which had one Dalek massacring everyone and ending up going suicide, I felt compelled to change to dalekslayer96 (I was playing on a cracked account back then). After a full month, I finally did it. And I use it for EVERYTHING.