That dragon pic a couple of posts up is great!
The only thing that I think you need to be more aware of, is that multi-lined brush you seem to like to use. Maybe its just me but maybe you could go over some of these areas with a different type of brush.
And I know looking for new brushes can be boring when you're trying to get a piece done lol.
For myself I've kept the types of brushes to a minimum (I've got 4-5 that i've been using practically all of my recent pieces) that will help me achieve different effects;
- a block-in brush (oval shaped), which i tend to switch back and forth the opacity dynamics.
- 2 texture brushes
- and another texture-type brush with colour dynamics enables, which I usually just feed off of all the colours it paints. Dont really use too often, but just to change it up a bit.
http://gkconcept.weebly.com/