Lack of adequate lighting is my biggest gripe. Usually everything is fine as long as the sun is up (and how much time do we get to spend in the room with the sun up, anyway?), but as soon as it's dark outside most rooms turn into caves. In the Marriott I'm in now there are no fewer than 6 light switches/lamps to turn on, and it's still far from adequate sitting at the desk trying to work. I guess the power drain of a decent voltage lightbulb costs too much?