I have an S3 right now while my HOX is being repaired.
I miss the feel of the HOX, it was really starting to grow on me. You just can't love the S3, it's so soul-less. I like loads of things about it - but when the HOX returns, I'll be back on that I think.
I'll miss the great battery life, physical home button (well, the ability to wake the phone with it) and the power button on the side....but...
HTC One X
Nokia Lumia 800