There is great satisfaction in doing things entirely for your own sake. I am very happy when I am able to express myself through my art. It helps get me in the right headspace (with awesome music and tasty snacks involved). I spend a lot of time browsing reddit, r/ArtPorn, and other art channels (sadly, hardly ever a participant, but maybe that will change), and I get instant gratification from viewing artwork by others.
I am challenging myself to dedicate time to doing something I love by completing one painting a week (new painting every Thursday). I think this sort of long-term commitment will outweigh any other form of simple immediate gratification, and I get to continue doing something I love. That in itself, is the ultimate satisfaction.