I figured my room's messy because I'm lazy, but no, it turns out it might be
because I'm creative:
Studies are piling up that show that messy desks are the vivid signatures of people with creative, limber minds (who reap higher salaries than those with neat "office landscapes") and that messy closet owners are probably better parents and nicer and cooler than their tidier counterparts. It’s a movement that confirms what you have known, deep down, all along: really neat people are not avatars of the good life; they are humorless and inflexible prigs, and have way too much time on their hands.
It's true - I do the cleanup dance every time someone visits, but otherwise it's usually a bit messy. But now there's a perfectly good excuse!