For me it depends on the type of picture I am painting, but lately I have been listening to a lot of Pretty Lights.

http://prettylightsmusic.com/music/

for more aggressive monster paints I might be more entitled to listen to something like this...

https://www.youtube.com/watch?v=_XhaRGEc9aw lol :P

Lately I've been on a bit of a Synthwave listening spree ( things like
Dynatron https://www.youtube.com/watch?v=Ak1-qLbHHCM,
Power Glove https://www.youtube.com/watch?v=pB9SsI6jZtI
and Mega Drive https://www.youtube.com/watch?v=bOkzzmttJsE )
But yeah, as Cyeclops said, it also depends on mood and the mood I'm trying to create.
For dark, angry things I'll listen to something like
Meshuggah https://www.youtube.com/watch?v=kBEUTntgMOI or
Detest https://www.youtube.com/watch?v=Is8NFYUXfDs
For Happier, less agressive things probably something like
Infected Mushroom https://www.youtube.com/watch?v=hMIQsvuOwXc or
Devin Townsend https://www.youtube.com/watch?v=lVQPvrM-_5E, https://www.youtube.com/watch?v=rokLH-YRZ1g
For mellow stuff stuff like
Amon Tobin https://www.youtube.com/watch?v=SVEusVobh5s or
Devin Townsend https://www.youtube.com/watch?v=xDn8HY_UUA4 ( yeah this guy again, but he makes a crapload of stuff and it's all brilliant. :P )
Sorry about the huge post all of a sudden, but I'm pretty passionate about music. ^^ And I don't make playlists.

Don't make playlists, always listen to full albums, so playlists of albums maybe?

Been in a shoegaze and dreampop mood recently,
So I've been listening to a lot of Jesu and pale sketcher (same guy different project)
https://www.youtube.com/watch?v=gBs-cZs9m8U
https://www.youtube.com/watch?v=aec0K2tFX8k

Also my bloody valentine, arguably the most popular and influential shoegaze band, check out loveless, it's widely considered to be one of the best albums ever
https://www.youtube.com/watch?v=l9-NOIalUYU

Also tokyo shoegazer
https://www.youtube.com/watch?v=natQF-y0Ez8

Mixes - https://www.youtube.com/playlist?list=PLoUsc2gYUFzXBwRs6Uc7D8tjyul6zoLd0&feature=mh_lolz

Beats - https://www.youtube.com/playlist?list=PLoUsc2gYUFzUS6ZtUX6kkE9S7ioyBpKqm&feature=mh_lolz

Individual super awesome songs - https://www.youtube.com/playlist?list=PLoUsc2gYUFzU3Y1bK8dnZiNaPtBD0PUaX&feature=mh_lolz

Post the whole playlist? Wooow, my playlist is 37.5 GB O.o, but I guess that I'm more like cyeclops, it depends on what type of painting I'm drawing and in what mood I am.

For me generally it depends on what mood I'm in, obviously, but my playlist is composed of movie soundtracks mostly..

and of course heavy metal bands like As I Lay Dying, Demon Hunter, Becoming the Archetype, Sleeping Giant, Hands...

:p

https://www.chilltrax.com/playlist/player.html