This is a great question JillSwift 

My husband ordered business cards for work recently and asked me how he should list his name and title. Of course I said - Name first line your title on the second line; you are who you are, not the title you hold.

It got me thinking about 'labels' and I kidded around with him about creating a business card with my name and title 'atheist'. Of course this was all in jest but your question has brought me back to that conversation.

I couldn't imagine walking around exclaiming "HI, my name is Renee and I am atheist!!"  For me if the subject is brought up regarding a theistic belief I will advise those proselytizing that I am atheist and regard the word the same as I would if someone offered me a Dr Pepper and I tell them I don't drink Dr pepper.

As far as being labeled or known as "renee, an atheist" I would rather be - Renee - always smiling, positive and tolerant....and atheist!