I try to make a good texture that matches the skin of who I'm aiming to bring to my game, and if it doesn't fully come out right I tend to use the in game designs to cover the face (like either the square of circle) for example to cover the face, match the color of the body, then lower the transparency to look to blend it as best as I can.
Then over time I'll change the attire up and hair styles to keep up with what's going on.
I still play older games too. So I'm able to take a texture that I downloaded back when the server was up. Then shape it to look like somebody completely different. I've surprised myself a few times with that technic.