Consistency is not something that just happens. In sports, in the arts, being able to produce consistently requires practice. Coordination helps, too.
Sometimes it comes about from coordinating outside things – for me, it began with setting up all my photography equipment to default to AdobeRGB. My camera and my software is now all using it. I also got a i1 display calibrator, by XRite, which has also made a difference in what I see, and what is produced.
These are things which have nothing to do with my ability to shoot a picture, but more with my ability to produce one with decent color. It is making a significant difference, and although what I see is subtle in its differences, it is very much there.
With that done, I have since picked up the brush and the needles again, and that feels very good.