Hmm... so many choices... off the top of my head(and for fun), Iron Man when I want to go
God-Tier Revenge-against-humanity mode.
Lux Aeterna for when I go Unexistent God Slayer alongside Sakura.
And, most of the Shadow of the Colossus soundtrack for when I just feel like destroying universes.
Special mention goes to The Concept of Love(Passion Mix) for when I just want to love humanity again.
And EXTRA special mention goes to all of the Cardcaptor Sakura soundtrack. Seriously, ALL OF IT.
Well, I think that is enough before this post becomes it's own page. Though Yume might not be the best example for CCS... wait. Never mind, it will do.