I just wanted to add my 2 cents. First, I'm a beginner. I have a business name because I hope to one day be able to charge for photography. But I don't plan on that happening for a while. But in the meantime I build my portfolio under my business name, I hope no one thinks that just because I stick a watermark on my pictures or have a facebook page or a website that I am actually charging people for my practice.
Second, I think there is a lot of snootiness from pros towards beginners. But you know what? If I were them, and I put in the time and effort to educate myself, and people were coming to me for advice I would probably be snooty too. That's why I try to be pretty humble when asking for advice because I know that I'm getting the benefit of their work.
And to the original question I prefer your own name as the business name (I use my name as my business name in interest of full disclosure). I am what I am selling. I am selling me, so I market me. So far "me" is not a very hot commodity