A way to change your character without deleting them would be nice. I've had my titan for a very long time now and to be frank I just don't want to be a human anymore. When my friends and I bought the game we all decided to be different things, and I got stuck with human. At the time I was ok with it but now I really want to change it. I know I can just put my helmet on but I don't want to have to. Also I want to make my hunter female. I don't care if I have to pay for each character I change. $5 dollars seems like a reasonable price to change their appearance. I know I'm not alone in wanting this in the game. The spark of light is the best thing people have right now but you still lose all your faction rep. It also won't be very hard. You go to Bungie.net, then choose the character you want to change, next time you log onto that character instead of taking you to the orbit screen you go to the character creation screen, when you done with your changes it takes you to the tower. World of Warcraft is a good reference for this, in that game they do pretty much everything I just described.
I hope my voice is heard on this subject and thank you for listening to me.