I have used Windows Mobile, iPhone, Blackberry as well as Android devices in the smartphone arena. Since my latest jump to Android, I don't think I will ever go back to any of the others.
Android is just so robust and does so many things that the others just can't touch. It keeps me connected to family, friends and even work no matter where I am.
I've written a Hub on this as well. Feel free to check it out. It deals with iPhone and Android. I hope you find it useful.