Well, I'll tell you now.
You wouldn't want to use downloaded brushes for your textures.
It's pretty much the same as c/p.
Well, I can't say much about that head.
That's the flaw.
You have to make heads that are full.
And, if you're going for a simple head, I'd suggest atleast putting something on the back/side/front so it wouldn't look so plain.
The mouth is too wide imo.
Try to add something onto that head.
It's pretty plain.