'Shit'

The product of too much free time.

This was supposed to be a messy sketch, but I wanted to try how neat I could shade again, and I'm pretty satisfied. ^{although this is nowhere near legit-level. XD}
Now I need to do something about my crappy linework.
Any tips, advice, etc.? That would be greatly appreciated.
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^{Photoshop CS, 2 hours}