On one hand, he is publicly atheist and is openly critical of religion. This is indeed valuable in a country like the US. On the other hand, he is an anti-vaxxer and peddles medical misinformation.
Because I am a skeptic first, and really am an atheist because I am a skeptic, I am not a big fan. I would also say that a mildly religious person who is otherwise pro-science is preferable to an anti-science atheist. Better a Kenneth Miller https://en.wikipedia.org/wiki/Kenneth_R._Miller than a Bill Maher, IMO. #religion