< Android 4 is good. 4 removed flash support and I rank it only marginally preferable to iOS.
Windows 8 seems alright for mobile applications. Will never put it on a computer - Windows 7 will suffice. Hopefully, Windows 9 (NT 7x) will get consideration if it loses the idiot-tile UI for laptops/desktops.
Apple will never, ever, under any circumstance, be purchased by me unless they pull some kind of inconceivable 180 in product, marketing, and sales philosophy.
I will go without the device if it is only manufactured by apple - and I refuse to buy anything with the "i" prefix (and anything that has Blue Tooth, Headphone Jack, or other standard of connectivity that bothers to mention that it is compatible with the ipod... that's right - I am so hateful about it that I will not purchase a product because it has an asterisk on the box that says: "compatible with ipod").
Like I said - Android pissed me off with their dropping of native flash support (I understand everything is going to HTML 5.. but still) - and Google at large has been making a number of strong-armed moves against consumer freedom that have me giving them some sideways glances these days.
Microsoft went out of their way to create a good mobile OS that attempts to be truly multi-platform across multiple processor architectures (basically the ARM based processors)... then decides to retardify all of it by making the PC UI the same as the mobile UI and making it exceptionally difficult to get anything resembling a functional desktop again.
Android is far better than iOS and Windows. I've used Windows, iOS, and Android. Windows didn't allow me to do a whole lot, iOS doesn't let me do a whole lot and there is inconsistency in some places and it's definitely not as simple as some of Android's features. After having used iOS and Windows, when I switched to Android, I felt like there were no limits. I bought the HTC One S as my Android phone and I could do so much with Android that iOS couldn't do and now I have a Galaxy Note 2.