The pictures don't really do the iPhone 6 complete justice, the feeling is a wee different when you actually see it in person. The camera sticks out only a couple of millimetres and the antenna lines are a lot less thinner than you might presume. I think the antenna lines give the space-grey iPhone 6 a very futuristic design. It may sound a bit silly and I can't really explain it otherwise, but it reminds me of Star Trek ships a bit. That being said, I don't have the same feeling with the silver or gold finishes, but then again, I never liked those anyway.
The camera is really an unfortunate design decision, but I can't say that it bothers me that much. It actually gives me a bit more sense for the camera, because it is easier to feel it when you're taking a photo sideways and aren't immediately sure on which side it is (I often forget). Previously you would more easily touch the lens, whereas now you can feel the edge of the camera without touching it. It's also a bit easier to clean, because you wipe more easily around it. Overall the polished aluminium feel just beats the glass of the iPhone 4 and the curved edges give it a very pleasant one-handed feeling (really good for swiping) that makes the iPhone 4 very chunky and hard-edged in comparison.