King of Prog-I mostly follow the Canterbury Music scene which is part of the prog rock era. It's my favorite music but I listen to lots of other things too-yes I'm a rare bird since most people found prog rock repulsive which made it die in the late 70's.
Best definition of prog rock is at:
Progressive rock is a style of music that combines classical music's sense of space and monumental scope with rock's raw power and energy. There is frequent inclusion of other musical styles such as classical, R&B, jazz, folk, avant-garde and world music. Arrangements are typically complex, dynamic and multi-dimensional usually featuring intricate keyboard and guitar playing. Many of the early progressive rock bands incorporated a Mellotron or string synth to simulate an orchestra backing. Dynamics are also an important part of progressive rock. A mixture of loud passages, soft passages and musical crescendos add to the emotion of arrangements, as do extended instrumental solos, which may involve some improvisation. It is also not unusual for bands to compose lengthy, yet structured, multi-movement compositions that center on a core musical theme. Lyrical content may draw from science fiction, mythology, fantasy and utopian literature.
see:
http://ghostland.com/ghostland/about.asp my list:
gong (and all related groups)
King Crimson
Pink Floyd
National Health
Hatfield of the North
Genesis(peter era)
soft machine
Steve Hillage
Yes
Nektar
Zappa
Jethro Tull(only until 77)
Moody Blues
ELP
UK
Mahavishnu Orch
Caravan
Can
Camel
Hawkwind
Focus
Brand X-phil collin's real band
Strawbs
Mike Oldfield
the new era
Radiohead
Marillion
Smashing Pumpkins(not sure I would put them in this catgory)
Oztric Tenetacles