dont like the font and mario is kinda pixelated , Also I think you should add some blue near mario but other than that I like it.
I like how Mario is pixelated personally...Though I agree the Font isn't the greatest. The background is pretty win though.
All your signatures look the same. A render, which is pixely, in this case, in which I don't like, on the right/left, and then text on the other side of the render. And imo, you use bad choice in text.
I would never use a fractal as a background. Fractals are too arbitrary to create a flow with. You always want to try and create a flow. Even if it's bad, it's better than none. Your text is too big and your render is too small. The text should never draw attention from your focal which, in this case, would be your render. That being said, your sig needs more focus so that the eyes are drawn to the render. This tends to work better when you have flow. It looks like you also stroked the render and text with a thick, black line. Renders should never be stroked. You want the render to blend into the background a little and stroking works against that. Text, on the other hand, sometimes works with a little stroke. Only a little one, though. Finally, your border isn't great. That shouldn't be worried too much right now. You'll get the hang of that in time. Now that I've gotten the critiquing done, your sig isn't bad. It's pretty good for your skill level. Your placement of the render and text are pretty good. Good job. Right now, if I were you, I would look for some grunge and smudging tutorials for your program. Good luck to you.