JW's do such a good job discrediting every other religion, so many people who leave do not believe in anything after they leave this cult.
I believe the reason there is religion is because we as humans want to belong to some type of group, after I left the JW's I researched christianity, buddhism, hinduism and islam. I think because I grew up christian I am comfortable with it, but only if it is liberal and makes you feel good.
After being out for over 25years I have now decided god has given us our conscience to live by, if it feels good it is right, if you question and have doubts then it is wrong. You know what is right in your heart, thats what I follow now.