I like all kinds of music but I usually say that rock/metal is my favourite genre. No other type of music allows you to unleash such raw emotion, whether it's euphoria or rage. I especially like it because the lyrics can be deep and meaningful or just an excuse to have a good scream at the world, yet the music is still powerful.
Two tracks I usually rely on are:
Sepultura 'Roots Bloody Roots'
I also have fond memories of seeing metal bands live and headbanging so much that my neck is sore the next day. Good times.