My favorite pattern, stripes, on an unfamiliar subject, merfolk, for Inktober '15.
Also more Great Wave riffing here in the water-power effect thing. This is more my speed, when it's considerably subtler than a sledgehammer.
As for not my speed, the dueling background here has full detail at front and then becomes suggested as you go back. I'm trying to get more comfortable with using large chunks of black, but losing detail is tough.