Color really doesn't have interaction if it's full of colors. It's the interaction or relationship among or between colors that makes a color image. This usually happens with a few colors, not a glut of them.

If you're just going to meet consumer or clients' demands, you might as well be a plumber - the work will be more frequently available.

If the light is great in front of you, you should turn around and see what it is doing behind you.

Gesture is not always action.

All these factors are only valuable if you're curious. But in any case, the more knowledge you have, the more things are open and available to you.

It's important to realize that the images are everywhere, not just where you want or expect them to be.

Since the background is as important as the subject, you mustn't let it default by chance. You must control not only vertical and horizontal, you must be aware of the depth of field (or lack of it) that you want in the background.