I have no "pride" in being an atheist, I simply am. Being an atheist does not define me to the world or to myself. I did not have to do a lot of gut wrenching soul searching or study to decide there is no god, I simply did. Actually it is only very recently that I've put the label "atheist" upon not believing in a deity.
For the record, yes, I was once a believer and read the entire Bible (it's the name of a book, like The Lord of the Rings) so I am very familiar with Christianity and its workings. An irony in being an atheist is that I work for a religious organization, but in a secular capacity.