My family all believes in God, but we never went to church or really even discussed God.
My mom's sister is quite Catholic, and while I don't know if they still attend church, they used to quite often when I was younger, and her kids all went to a catholic elementary school, and are now in a catholic highschool.
I think I may be the only atheist in the family... for awhile me and my parents had quite deep discussions of my beliefs, and now it's just become accept. As I grew up, I questioned religion and god more and more, and now I'm a firm atheist... although sometimes I think my personal beliefs (beyond that of just not believing in god, but also my beliefs about humanity and whatnot...) get in the way of truly taking life seriously, and may already have had repercussions on school performance and shit. Kind of sucks, but being nearly 21, I guess its a good time to get these things ironed out so I can excel later in life. Just some tough kinks that need to be taken care of...