hardlyeverhoovers salaams sister! I know exactly what you mean from the quote about shivering of the skin! For me, it was when I realised that it is pure arrogance to think we know all the secrets of the universe, and like you I read the Quran from cover to cover. As a biologist, I was astonished at the accuracy of some the verses relating to evolution and science. At first I thought I could only convert once I understood Islam completely and had answered all my questions. By then, I was praying, fasting and following the main tenets of the faith (except the no sex before marriage lol!)
My soon to be DH was worried about me converting because he was afraid that he would have to become strict, and concerned that he didn't have the knowledge to answer my questions. I mean, get this, he can recite the Quran by heart, but he had NO IDEA what he was reading! 
He had never learned the meaning of the Quran beyond a few choice quotes, and had been reciting like a parrot for 15 years.
Now I now that most Muslims in the UK have been brought up like this, in more or less total ignorance of the contents of their holy book, so it's no wonder that cultural inheritance reigns supreme. To this day, I find it absurd, and reminiscent of the early church conducting all services in Latin so that only the learned few could understand.
Why is it like this in the UK? Is it the same all over the non-Arab world?
It means so-called Sheikhs have dominance because hardly anyone is in a position to question their understanding. Take the hijab issue. Hijab is a pre-Islamic custom worn by free women, partly to show they were not slaves. It is not a uniquely Islamic from of dress, it is,if you like, a cultural hangover from pre-Islamic days. Why are so many Muslims stuck on this as a fundamental expression of faith?
(Women and Gender in Islam. By Leila Ahmed. Great study on the misogynistic interpretation given to many aspects of Islam by male scholars)
Salaams to all the sisters on here, Muslim or not!
Great thread, we need some more discussion areas like this 