This is tricky because on the one hand theres personal preference and on the other there's business advice.
I think you look great without make-up. I think that you being comfortable is the key to good service which is the key to repeat clients and good business. I think the girl next door look is a great fit for your style and I think a lot of people, myself included, will be a fan of it.
On the other hand, sometimes people choose providers for a touch of glamour and that something exquisite that is out of the ordinary. I'm thinking MsManda here, just an experience that is not going to be like what a person can have in their personal life. So some people will go for exquisite courtesan experience, which is great.
If I were you I'd (a) Do whatever makes me comfortable. (b) if you're comfortable with either I'd offer different experiences to the clients. Msmanda does this and it's amazing. SO you could offer, girl next door, girlfriend, alt look, pin-up style etc etc. That way you could assure that the client will be happy AND a client who experiences Melanie as a pin up might want to revise for the girl next door experience and so on.
Again though, your comfort is the key :)