Here's a smattering of stuff off the top of my head.
Drum & Bass, Breaks, Glitch-Hop, Ghetto Funk, Dubstep, Ambient
Artists: Danny Byrd, Sub Focus, Teebee, Noisia, Phace, Logistics, WBBL, Evol Intent, High Contrast, Tonic, Featurecast, Calibre, Slynk, John B, Calyx, Metrik, Commix, CMC & Silenta, Pimpsoul, Future Funk Squad, A.Skillz, Krafty Kuts, Deekline, Plump DJs, Klute, The Prodigy, Pressure, Chemical Brothers, Boards of Canada, Caribou, Jon Hopkins, The Orb, Aphex Twin, Samples, Stanton Warriors, Concord Dawn, Bobby C Sound TV, The Breakfastaz, The Funk Hunters, Defunk, Freddy Todd, Gramatik, GRiZ, Sub Focus, ill-esha, Gladkill, JPOD, Kalya Scintilla, Spor, K+Lab, Netsky, Opiuo, Mochipet, Stephan Jacobs, Rusko, DJ Food, VibeSquad, Father Funk, Beats Antique, Dillinja, Spoonbill, Skream, Russ Liquid, Benga, Pastician, Digital Mystikz, N Type, Beat Fatigue, Minnesota, Pinch, Big Gigantic, Psymbionic, Caspa, Phaeleh, Orbital, Scuba, Loefah, Goth-Trad, Adam Freeland, Thriftworks, DJ Shadow, Stickybuds, Funkanomics, Coki, Starkey, Vaccine, Nero, Joker, Phutureprimitive, Amon Tobin, Black Sun Empire, Nu:Tone, Ed Rush, Optical, Shy FX
Trip-Hop
Artists: Massive Attack, Thievery Corporation, UNKLE, Portishead, Morcheeba, Leftfield, Groove Armada, Kruder & Dorfmeister, Sneaker Pimps, Nightmares on Wax
Hip-Hop
Artists: Blockhead, Wax Tailor, RJD2, Abilities, Mos Def, Gift of Gab, Sage Francis, Wu-Tang Clan, Eyedea, Aesop Rock, MF Doom, Run the Jewels, Tonedeff, A Tribe Called Quest, Cunninlynguists, Nas, Substantial, The Roots, Dead Prez, Black Star, Digable Planets, PackFM, Talib Kweli, Smif-n-Wessun, The Notorious B.I.G., Warren G, Immortal Technique, Big Pun, Murs, Hieroglyphics
Post-Electronic Pop/Rock type shit? Dream Pop? Indie Pop? I have no idea.
Artists: Elder Island, Haelos, Alex Winston, London Grammar, Maribou State, MS MR, Warpaint, RY X, Rhye, Parra for Cuva, Bleachers, Zero 7, Aurora, Phox, Lucius, Alt-J
Folk, Folk Rock, Americana
Artists: James Taylor, Bon Iver, Simon & Garfunkel, Cat Stevens, Emmylou Harris, Joni Mitchell, Brandi Carlile, Patty Griffin, Peter, Paul and Mary, Willie Nelson, The Lumineers, Of Monsters and Men, Lord Huron, Hozier, Shakey Graves, Nanci Griffith, Ray Lynch, Neil Young, Daughter, The Milk Carton Kids, I'm with Her, Nickel Creek, Punch Brothers
Progressive Rock (Maybe kinda, sorta Metal?)
Artists: Porcupine Tree, The Pineapple Thief, Gazpacho, The Flower Kings, Kolm, Steven Wilson, Airbag, Lunatic Soul, Riverside, Soen, Haken, Blackfield, King Crimson, Leprous, Pink Floyd, Rishloo, Katatonia, Dredg, Rush, Opeth, Rpwl, Jethro Tull, Chroma Key, Karnivool
Tool
Artist: Tool
A beta version of the Android theme is already in as of 0.24.0! It's still a work in progress, but Wefwef dev seems to move along at an impressive pace.
Settings > Appearance > Device Mode