I have a separate wooden board on top of my desk that covers the desk's entire area. (The board is made of nice wood, making the desk look more classy than it actually is. :)
I'm thinking about tilting the board a tiny bit (maybe 15°) to make it more suitable as a drawing area. About like this:
Is it safe to operate a MacBook (in my case a 15" MBP, no SSD) on such a titled surface on a permanent basis? I'm mostly thinking about possible damage to the hard drive or other components that are designed to work in a (more or less) perfectly horizontal position only.