Thievery is *IT*
Lebanese Blonde started a huge transition in the music I listened to. I used to be into hard rock/metal/anger in general. Lebanese Blonde introduced me to chillout. Now I'm big into ambient, techno, chillout, nu-jazz, acid jazz, trip-hop, downtempo, that kind of stuff.
Other good artists are
Portishead
Massive Attack
Tricky
Air
Ratatat