I like a lot of different types of music, though I have to admit to being a bit stuck in the 70s, particularly Prog Rock, at times. Luckily I have a daughter who has introduced me to a lot of Indie/alt stuff.
Particular bits of music that I find help, for different reasons:-
Janis Ian's Between The Lines album - so depressing it cheers me up (work that one out)
Yes; Soon - I find this calming
Mearloaf - great to sing along to at the top of my voice!
Seal; Kiss from a Rose - now this is a special one. There's something about the tune/rhythm which really really calms me down.
And... oh, lots of others! I love a good sing-along to anything I like on the radio. I'm on my own most of the day so I can get away with it