One thing I really don't like is when you put on the bedside lamp (or floor lamp) and the light is burned out..

At my house lights burn out very,very infrequently, yet so many hotel rooms I have stayed in seem to have a problem with in-room lighting.

Others-when you go to an ice or vending machine to find out it is out of order. At least put a sign up saying where the nearest working one is.