Non-smoking and top floor are my standard and most important requests. I really have to have a NS room, and top floor, when we get it (have been lucky to get it each time) ensures no heavy feet above us.
Beyond that, I do request views, but don't really "expect" to get them, but if I do, it's nice. I requested Boardwalk view at the BWV, which was absolutely beautiful, and EPCOT view at BCV, from which we could see Spaceship Earth and a bit of Illuminations. Haven't stayed at VWL yet, but when we do next May, I will use InstImpres's room reports to see what I might ask for...
Hope this helps!