1) I had supressed too many things for so long because I felt like I needed to "wait on Jehovah". My dad (who taught me "the truth" disassociated himself and put those seeds of doubt in my head. He told me that the day would come when the society would have to change the 1914 generation definition and that it was a house of dominos for them. After he died, his words came true which gave me my first aha moment.
2) Jesus said you would know his people by the love, I only saw unconditional love. The elders were more like the scribes and pharisees instead of loving shepherds.
3) Got disgusted with the number of pedophile issues and the victims being threatened with disfellowshipping if they said anything.
4) The shunning of disfellowshipped ones (especially those trying to come back) seemed barbaric.
5) The nail on the coffin for me was the UN issue.
6) More and more I felt like the governing body was edging Jesus out of the picture and placing obedience to them over Jehovah and Jesus.
I, too, innocently was looking for the JW website and stumbled upon a website talking about reform for the organization. I hesitantly looked at it not knowing if it was "apostate" or not and was relieved that I wasn't the only one that felt like there was something seriously wrong in the organization. It had a chapter of Ray Franz' forbidden book linked to it and I read it. Found myself ordering the book the next day and read it along with his other book and realized that the organization isn't/wasn't what I thought it was.
There were about a hundred other little things but these were the big ones.
Stick around, you will learn a lot on this board. Most posters are great people, not the evil apostates we've been warned about.
edited to add: elderelite hit it spot on...couldn't have said it better because I think ultimately we all start listening to the little voice inside of us.