I noticed that Timurlank has recommended Heilung en.wikipedia.org/wiki/Heilung as a good band to listen to while painting. They would certainly be inspirational if you were working on an Early German or Viking army, or, say, setting up for a re-fight of Teutoburg Forest.
"What instrument do you play in the band?" "Spear and shield"
I started listening to them after they came up in my YouTube feed after I started listening to The Hu Band, which had been recommended to me by a friend. Now these guys combine traditional Mongolian musical instruments, throat singing and heavy metal, which they are calling "Hunnu Rock".
For me I listen to a lot of metal: Metallica, Slayer, Motorhead, Slipknot, Iron Maiden. I haven't grown up really but I sometimes listen to Classical music, because what kind of lunatic listens only to Heavy Metal non-stop?