It's a nice sig, but I have some pointers that you could work on:
-To the left side of the mask you see that you were working out with the smudge tool since it's one big smush to the left, What you could better do, still smudge it like you want to but make sure you have a layer (unchanged/unsmudged) of Tobi so that you can put that ontop of the smudged one, that way you still have the colours flowing over into eachother and it'll be more in proportion.
-Don't try to smudge too much and too big parts at once, that way you can distort a picture greatly, (not saying you did here

) if you want to create that effect on the mask, just duplicate a layer and start fooling around with your smudge tool (You'll notice that after some practicing you're able to (perfectly) flow the colours into eachother without creating a blank spot.
-Just a lil one, I'm not sure but you could try to also put the background you have in the top right corner.
-Things like names are more likely to be ruined by the smudge tool thus making it harder to read, try not to overdo smudging on names.
Hope I'm able to help you out a bit

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