Android def isn't for everyone, but your assessment seems a bit harsh to me. Fragile back cover? It's a very flexible plastic and from all the video's I have seen of drop testing, the back never breaks, it just flies off. It's the glass front of the S3 or the iphone that is more fragile.
i have no idea what this means. Can you retype what you meant to say? "the memory card slot/files the cheap feel of the Samsung..."
And you said texting and calling was too much work? I don't understand this, since it is identical to doing it on the iphone. Launch gosms or whatever text app you use, type message, hit send. Or open S-Voice aka Siri knockoff and simply say, "text debbie". Same deal with making a call.
To me, it seems like you are just slamming a product for no real reasons.
It's perfectly acceptable to simply say, "I gave the S3 and Android a try and it just wasn't for me. I couldn't get comfortablewith the OS and the phone wasn't comfortable to hold." these are tangible and believable reasons.
To me, and this is just my opinion based on what you posted here, it just appears as though you didn't want the S3 to begin with (looks like you got forced into it), so immediately you already don't like the device. So anything that bothers you about the phone gets amplified 10 fold.
But it sounds like you are happy again with the 4S andin the end, that is all that matters. I personally like the S3. Love the camera and being able to set so many features. I like the video pop up feature too. Came inhandy on a stereoinstalli did last weekend. Anyway, i digress.