My choice would be the one on the right, for me simple is better unless the one on the left has some kind of special meaning for you. I've been using a logo brand for a while now because I didn't like having my "signature" out there for someone to copy, use, steal....just me being paranoid. The one problem with a logo brand is that people, customers, need some way to associate the logo with you, if they have a piece with only your logo on it how do they find you to purchase another or search for you on the web.