More general thoughts
I really hate hair or mold in the bathroom.
Other guests that let the room doors slam shut in the middle of the night.
Paying to park at a hotel with lots of parking.
+1 for the Courtyard free breakfast (no longer stay at those because of it).
When the toilet seat is loose.
The NBC news story about how the maids just wipe out the glasses and don't really wash them.
Pulling back the covers on the bed and there is indent of the person that slept there the night before (apparently the sheets didn't get changed).
Shower heads that are too low, don't work right, leak all over, etc. etc.
Noisy AC units.
Poor desk chairs that are uncomfortable.
+1 on the end of the bed covering thingy.
Lack of proper selection of TV channels. Example: 6 channels of ESPN, CNN, networks and the HBO channel that never shows movies.
TV remotes that don't work.
Clock radio tuned to the spanish station at full blast and a 4:15am alarm.
I'm sure I'm missing a bunch.