My desk area is by far the messiest, since I tend to spend a lot of time sitting there. I have the habit of just putting anything anywhere on top of the desk - plates, paper, wrappers, bottles, anything - and yeah, it tends to build up after a while. Usually takes some time before I look at it and finally go "yeah, that's too much, time to clean up."
Most of the rest of this apartment is clean. Ish. Relatively. Okay, maybe slightly. Far from spotless, but nowhere near as cluttered as my desk is.
(I probably should clean it soon, especially if I'm planning on actually getting that new desk I wanted...)