I'm not into any one particular band or artist, preferring to have a variety of sounds and voices.
I find that if I listen to just one artist, then the sound becomes too repetitive - I like my music sessions to be somewhat of a journey of emotions and vibes.

MASSIVE ATTACK, and LEFTFIELD, always seem to have a mixture of vibes within a single album, so I guess that they'd be at the top of the list - along with JEAN MICHEL JARRE, and MIKE OLDFIELD for those more bizarre frames of mind lol