Classical/instrumental/postrock/epic: Godspeed You! Black Emperor, Max Richter,

Techno/electronic: Juno Reactor, Lords Of Acid, Paul Oakenfold, Wrecked Machines

IDM, trippy electronic: Boards of Canada, Autechre, Future Sounds Of London

Hip Hop/trip hop/chillout/downtempo: Lemon Jelly, Clouddead, Why?, Boom Bip and Dose One, Kruder and Dorfmeister

Psychedelic/kraut/expiremental Rock: GONG (angels egg, wingful of eyes albums), Faust, BRAINTICKET (stick to cottonwoodhill and psychonaut albums, both soooo perfect for smoking) , Acid Mothers Temple (New Geocentric Wold album), Algarnas Tradgard.

Drone/ambient/passout music: Beef Terminal, STARS OF THE LID, The Dead Texan.

Acoustic/poppy/expiremental bands: edIT (more hip hop/glitch hop, still very good), Animal Collective (great), The Books, Islands.


Also, pandora is shit compared to LASTFM
If you want to discover new music, among many other things, smoothly and for free and with so many easy features, go to Lastfm.com and dl the software.