Lol, gonna try to keep this short.
Firstly,
I love sciences; I am not particularly fond of exams, but I do love learning new things, specially theoretical things that are of interest to me. When things such as the theory of evolution crossed roads with religion and was completely blocked out(or butchered into some pseudo-creation-evolution theory) due to the Qur'an having different thoughts on the matter.
Secondly,
Even though I was never really religious, I started to think how I'd go around raising my children; specially since abandoning Egypt is one of my key goals in life, how would they mingle out there while still conserving their religious beliefs? The mini-Muslim communities in outside countries just seem like Arabs that want to start colonizing the west, completely bordering themselves from the rest of the Country; I didn't want that.
Thirdly,
Women; I had very little interest in belittling my wife/daughter(s) because religion said so. Specially when it came to a potential life partner, I wanted an actual partner. and the way Islam described marriage made absolutely no sense to me.
Fourthly,
The seemingly mesmerizing words of the Qur'an pierced my ears. The Qur'an is often complemented for being one of the most beautiful writings ever, I didn't see that. The Qur'an to me was simply a book that sang poems of murder and eternal torture and sick twisted minds.
Lastly,
I simply don't believe in living one life for another.
EDIT: Also, I can't find place for divine interventions occurring regularly in the atomic world.
That was beautiful!