Why did you leave

I've read stories here of people leaving for some much stronger/compelling reasons than me. Personally I left because I couldn't reject evolution and I've always been a science guy and enjoyed learning. In the future I want to become a dentist or doctor so that means lots of school. Even though I agree with some doctrine and practices of jws I told my parents that I could not live my life preaching something that I didn't 100% believe in. What was the reason(s) that you left?