I voted for body.
A camera body forms the interface between myself and the camera lens, allowing me to operate the lens to the full extent of my abilities. Personally, if the body doesn't feel right, then my shots are not likely to be that great either. Any equipment that gets in the way between me and the shot is likely to be dropped out of usage- and ergonomics is usually the culprit. Cramped grips for my fingers, tiny dials, horrible UI- If I can't work it, I can't take the picture and out it goes from the rotation.
That being said, the lens -physically- is also part of the "body" IMHO- It also makes up a large part of the user experience. Dragging a gigantic 15lb lens around is a chore, no matter the body... Stiff or overly loose aperture rings are occasionally annoying too.
As a hobbyist, life is too short to be spent fiddling with poorly designed human-lens interfaces.