I know its a small picture but like uma in this
scroll down.. You don't want to go too light because you have to remember eyebrows.. and that can make it look harsh. I'm a person who has run a course of black to blond and I am naturally red-brown. I have been shunned by many hairdressers and any hairdresser is going to tell you to stay in your "color family" I think Auburn is a nice for you because you haven't strayed outside of brown and you could easily go back if you hated it.. you do something like blond or too many streaks and you are stuck for a long time unless yo cut your hair off.. which I have done many many times.
BTW.. I like your hair color now. You got that girl next door thing