I use a drawing of Asha from monster world 4 I found on deviantart, because asha is cute, and the game is awesome, other times I use a picture of trixie from Minty Fresh Adventure (a fan game of my little pony), because I found it cute too, and she has a horn... and I find horns pretty, like soem people like cat ears.
In short, kawaii, since I do not have a logo nor really want to make any more money with games so having myself a logo is not worth the time in my personnal opinion.
But I like your avatar more.