I've developed a hilariously pavlovian response to songs I used for alarms at some point or another -- I can still hear "The Authority Song" by Jimmy Eat World and, if I'm sitting or reclining, feel a physical itch to stand.

I only use a very quiet beepy thing anymore, or my phone if that's what I've got, and it usually doesn't even go off before I wake up (I deliberately set alarms a few minutes later than I'll wake up so that I have a chance to get up and pre-emptively shut them off), but for a while using songs was a fun way to play with the ol' brain!