The filter background is old and crappy these days.
The bar thing is old...and crappy these days.
The fonts are crappy.
The gohan stock is low quality.
I do like the cutting of the stocks.
You used borders, which is a good thing. But don't forget to put the borders on the top layer, otherwise images will appear on top of the border, which happens in your last 2 signatures.
If I had to choose one, I would say the third one is best. Because the background color matches with Goku. The filter effect of the background is not as apparent. And I like the way you did that border.