Research says that many people who no longer go to church, would come back if they were asked.
Church is great - nowhere else would you get such a diverse group of people together for the same reason. It's not a place for the holy and good, who have their lives sorted and are on their way to heaven. It's a place for those who are in need - messed up, broken, people as well as those who are more sorted - all on a journey of discovery, a realisation that life is far more than we make it to be, that it's full of mystery, wonder and love. Christian people know that as God.
Here are a couple of videos. In one below, Archbishop Rowan reminds us why B2CS is a good thing and then the one above, well, talks about what church really is... (it's a bit American, sorry for those of you who aren't)