I've looked through your gallery and it looks like you have fun with photography, which is good.
I'd say, it anything, try to look for things about your subject matter that are really interesting. For example, a snake might be really neat, but what are somethings ABOUT the snake that are neat? There are the colors, the scales, maybe the eyes. A statue may be interesting, but what ABOUT the statue? Is it some waterstains on face? Is it a bit of texture created by natural erotion of the stone?
Subject matter may be interesting by itself, but when you take that subject matter and focus on something more specific-texture, shading, emotion, whatever- it adds something more to the piece.