I have an IPad, used for gaming and reading, and Kindles, which are not used all that much any more. I find that I can read just fine on my IPad and I love playing my games. I will still use the Kindle for reading when travelling, save the battery life for playing games and watching videos. So I am an Apple, Kindle user.
I don't see myself using Android device anytime soon. I went with Apple because more of my friends use Apple products and it is easier for me to communicate and play games with them using an Apple. Now that I have bought a ton of Apple Apps, I can't see moving to Android and rebuying the apps.