It mostly depends on the setting or the beat of the music.

[url=https://www.youtube.com/watch?v=v8V0ag3c-HA]Songs like this usually get my Sci-Fi or near-future appetite wet[/url],[url=https://www.youtube.com/watch?v=bUwlqw8Qjsw]While songs like this get my medieval fantasy side working[/url].

I tend to look at monstercat and Derek for help on roleplays as they have really good songs, and they REALLY help when it comes to the genres above.