I truly, truly love flamenco music.
There's something about the music that just cuts straight to my core. Forget the caffeine, flamenco music will suffice.
On the very first day I set my sandals in Spain, I was enraptured by a locals' flamenco performance (you know it's local when it only costs a couple of euros, opposed to the touristy ones that charge you 30 euros—that's about $45). Ever since, I often visited flamenco performances throughout my stay. Before I left Spain, I made sure to carry back 6 hours of flamenco music back with me: CDs I locally bought from the land of flamenco itself.1
This video is three minutes of pure bliss to me; and I can't move on without sharing this.
1 Paco de Lucía is the summa cum laude of flamenco guitarristas. You can listen to his samples on iTunes.