I think art is something that we feel. Our feelings and all that we see in our lives is transmited in an image.
If we have a theme, each of us is going to see it differently. I think that is the beauty of art ; it's personal and open. It's personal because we put a piece of soul in it and open because we share it with others.
Learning how to paint, draw, photo, edit etc is very important , so that we can accomplish with technical means what we image/ want from our creations. But the teory is just a part of this. The important thing is what one does with all the info.
Works of art can't be loved by everyone. Is hard to please all. I believe it's impossible and that is not the purpose of art. In my opinion, if it's meant just to please the eyes, then it becomes empthy. It has to have emotions, a main idea. When I see a photo or a painting, I feel a part of what his/her creator felt. That is wonderful !