Wow, those 2 look really young! You did a good job on these.
However, I wanted to mention something about #5 as well. It looks like the burn tool was used around his head and shirt, as well as her shirt. It left some heavy gray shadows on their faces. And there appears to be something triangular sticking out from behind her head. Not sure what that is, but its distracting.
Other than that, they are very good. My favorites are #1, #2, and #7.
The camera is a very small part of the end result.
Also, to further expand on heip's point, I completely agree. While you need a camera to make all this happen, in my opinion, I would say that its 10-20% camera and equipment, and 80-90% on how the photographer uses the camera and how the image is processed (whether its firmware in camera, or using a photo editing program out of camera).
Over half the battle is won if you have good lighting and exposure.
