I also love the size, bit for a different reason.... its BIGGER than the rebels, it actually fits in my hands properly.
I love the optical view finder, the day the EVF become standard (as they have been talking about) i will be disapointed.
I just want to point out one negative thing (even though this is a love thread), the on / off switch, what a terrible position and design that was, oh man. When i turn a camera on and off, i want to use my thumb on my right hand, which a quick natural flick, this is a stretch and it should at least turned round.