Eh IDK, I mean I find broad thinkers to be the most sexy and with true atheism, you're completely ruling out the complete and utter possibility of things that may indeed be real and true that we don't have the capacity to have knowledge of or understand. There are so many possibilities for just about anything and for someone to be able to truly assert 100% disbelief in all that can't be seen/proven indicates a level of closed mindedness to me which is a turn off to a degree. But, at the end of the day it just depends on the person and how they're able to articulate and express their views. I can respect people that can assert their non-belief/belief without being condescending and spiteful toward other's views and feelings.