I haven't left yet but i'm on my way out. i have to stay a little while i have two kids and it will affect them to much with their friends.
Why leave? It's not the TRUTH. They've got some things right but some things wrong. It is not Jehovah's directed organization. If it were they would have their prophecies right in the first place and wouldn't have to change them, (he never changes). There are a lot of good people in the organization but there are a lot of good people in other churches too. Find where you feel comfortable, accept his son Jesus Christ as your saviour and live your life accordingly.
I've been wondering why it is that people that get out feel such an animosity towards it when they leave. I think maybe the answer to that is they claim to be the only ones who have the truth and everyone else is going to die. They say they have the only direct channel to Jehovah and when you beleive that you found it for so long and then realize you've been dupped it pisses you off and that is where the animosity comes from. And it's not like you can just leave, NO they have to destroy all your friendships that you've made over the years and you have to start over.
All I can say is research research research! READ YOUR BIBLE (Get a different version than the New World Translation) compare, You can understand the bible w/o the Watchtower and their books though they don't want you to believe that. And lastly Pray about it.