Android v Windows

I would largely describe myself as an Apple fanboy; I can't hide that fact. I currently have a 2013 MacBook Air (which is a college business student's best friend), an iPad 3 and an iPhone 5. My contract with AT&T is up in September and I have been giving a lot of thought as to whether or not I will get the iPhone (6?) or the next Nexus. I have never had an Android phone before, and I have had the iPhone and iPhone 4 before this. I have a lot of interest in buying a pure Android phone for the customization and things like being able to chose default apps. The main thing I would miss is iMessage. I use Gmail for personal and Exchange for the University email, and also use Wunderlist, Spotify, and GCalendar. As I thought about this possible switch I realized that while I am interested in Android I never ever would switch to Windows 8 or WP8. I just found that to be interesting and rather telling, does anyone have 1) any advice on my switching or 2) any similar feelings to Android v Windows?