I had the thought that, given how dusty rooms can get when they go uncleaned for extended periods, the rMBP could probably pick up a lot of dust...especially if it is in a room I sleep in. I've started taking to keeping it in a drawer. Perhaps I'll just leave it on my bedroom (IRL) desk-top inside my Brain Cell sleeve charging (I can't really close the drawer completely and keep it charging). I try not to use it too much before bed due to concerns about messing up my circadian rhythms, and sometimes when I'm good I'll just leave it on the desk top in the home office (outside my bedroom). If I want to save time for the next morning I'll leave it there inside a bag. Where do you keep your rMBP at night? (Especially with regards to keeping it dust free, but perhaps there are other considerations, like its interfering with sleep, etc.) edit: sort* of a poll; can't set up a ballot without knowing what the options are!