At home I am unlikely to answer, but in public and if I have time, I kind of like engaging with them. I'm always honest and tell them I'm not a believer, but I'll listen and ask questions...they present faith and I present doubt, that kind of thing. Or they say that shit about the difference between knowing his path for you and walking that path and maybe my doubt serves his will in some way, then they'll invite me to church and I never go (sad trombone)