I dislike hotel alarm clocks. They're operationally a pain for housekeeping to keep updated, and every clock model has its own unfriendly way to set alarms. I've been burned by hotel alarm clocks before on business trips, where either the time was wrong, or somehow the volume on the alarm wasn't turned up and you wouldn't know it unless you tested it first (which is yet another pain).
I would not mind if we got convenient USB charging ports on every nightstand and never saw another cheap digital clock in a hotel room.
(Edit: Apologies for making a "I do not like" post in a thread where people like alarm clocks... I know a lot of people like them and for some reason, I just had to throw in an annoying opinion about something that's been a pet peeve of mine!)