MP3 Alarm Clock 2.3.2

MP3 Alarm Clock 2.3.2 is known as a very useful Mac OS X alarm clock which is designed to play music. MP3 Alarm Clock is a free alarm clock program that supports many audio formats such as MIDI and WAV, not just MP3s. Unlike other alarm clock programs that only have a preset number of alarms, MP3 Alarm Clock supports an infinite number of Alarms, each with customizable playlists, day, time, volume, snooze times, and many other settings, giving you have complete control over your alarms.

Hate to go to sleep, and hate even more to wake up. Totally that guy setting multiple alarms, and then getting up 4 times hitting snooze on all of them. They're not exactly sexy, but half of life is just showing up...
For the Mac, have used "MP3 Alarm Clock" for ages, primarily because it was the first, it's never screwed up on me, and it does everything I've wanted it to do (My big thing is having a gradually increasing volume feature, which starts the alarm quiet and slowly amps up the music till have to get up or risk hearing loss).