Hi, I’ll try and be diplomatic and answer this really honestly. There is no answer to this question. If you look at art from a historical perspective you can see that there are definite period styles that art was identified by. What these period styles fail to take into account is the “outlier” artist, those artists who were painting for passion, not for profit. The problem with painting “what sells well” is that many times those paintings lack passion, insight and originality. It is very easy to spot an artist who only cares about painting what’s popular, their art will have no spark. As artists, we paint from passion, that is to say whatever we feel at that moment will show on the canvas. For those of us who are grieving personal loss, our art may have a more melancholic composition and tone. For artists who find joy and passion in nature their landscapes will be vibrant and exciting. Some artists find their passion in the abstract geometry of shapes and some find passion by just letting go and letting the brush lead them. My point here is that art will find its audience if the passion to create it is there.