OK trying to simplify this now that I am very clear on what i want.
Tell us a bit about who you are and the people you reach
Best example I can give you is as follows: Look at Roger Federer's logo and Tiger Woods logo. I need something that encompasses my initials. HD is the brand. SO concentrate on making the combination of the letters unique in all the world. Then if ytou can find something symbol wise to associate with it, even better. For Example Nike has it's swoosh. SO HD might have something as well. But for the most part concentrate on the initials HD.