I am not only an atheist, but also strongly antireligious.
I voted other. My family was as follows:
Mom: never particularly cared about religion, but isn't strong in her feelings. I guess she classifies as an agnostic.
Dad: catholic, but not active. Fairly sure as time went by he was increasingly nearing agnosticism/atheism, then cancer struck him, and he rediscovered his faith. Died convinced that the christian god exists.
Mom's parents died before I knew them very well, but weren't religious as far as I know. Dad's parents were catholic, but only his mother was strongly so. She remains so to this day despite, astonishingly, the untimely death of both her son and her husband, and a lifetime of unhappiness.
My family explained religion to me, but they didn't indoctrinate me. They told me the bare facts, and left it for me to decide whether I wanted to pursue spiritual things further.
I did go to religion class as most other children did, and had the usual ceremonies, but my family never put much emphasis on the whole thing. Back then I didn't have very strong feelings about atheism (as opposed to now), but the whole religion thing already smelled somewhat fishy to me.
The only person who was, and still is, bothered by my subsequent strong atheism is my grandmother, who keeps telling me I'll eventually come around (which irritates me to no end). My dad didn't particularly like it that I had no qualms saying I was atheist and antireligious, but never forced me to stop either.
Basically, I think I've had a very balanced religious education. My ideas were formed by me and me alone, without being forced on me in any way.