I think you will get more accurate answers if you tell us what kind of photography you do. A professional wedding photographer is likely to make more from a salary than someone who shoots landscapes to sell as prints. Then there are the staff photographers at magazines, and freelance photographers.
This is a very difficult business to get into, and how much income you deserve is directly related to the quality of the product.
Here is something to chew on. Keep it as a hobby for now, but try to edge into the market and find your niche. Once you find a customer base, you will have a better understanding of how much your work is worth in the market place and whether or not you can afford a career switch.
Regardless of whether or not you turn professional, never lose the joy that made it a hobby. Too often we (guilty myself) begin to do it for others and not for ourselves. Once that happens, your work will never have the same meaning to you.
Yeah, I figured that. I really will take any sort of photography job as long as it pays decently. I can do the art style photography on my own time. Sports, Photojournalism, Paprazzi, lol whatever pays the bills and lets me use a camera, well except pornography, I won't do that...I don't really believe in it.