Regarding Board Question #41344,
As an ex-painter, I can attest to the fact that making ceilings perfectly flat is the quite possibly the most aggrivating thing in the world. Not only do you have to patch something above your head (awkward), but sanding the joint compound on a ceiling means covering your entire body in white dust, coughing your lungs out, picking white goo from your eyes for the rest of the day, and blowing white stuff out of your nose for hours. It's quite the experience, really.
Not to mention the fact that all that overhead sanding makes your arm hurt like crazy, and the dust dries the heck out of your skin. It's so much easier just to spray a little texture and make everything blend in than making the effort to get everything perfectly smooth. Think of the painters, man! Those poor helpless painters!
-Red, yellow, blue