I have learned to absolutely loathe the sound of alarm clocks. The high-frequency buzzing and beeping of the things make me want to smash the living hell out of any alarm clock that comes in eye or earshot. The Hybrid Alarm Clock by Francesco Costacurta uses a pulsing, flashing, red light to wake you up instead.
Place it close enough to you and the incessant lighting is supposed to wake you, and only you, up out of your slumber. I have a feeling I would start to hate all sources of light too. Which could pose a problem. — Andrew Dobrow