The progressive rock genre covers such a expansive range of musical diversity and influences thus resulting in many sub-genres that have devoloped and progressed through the last four decades. With this poll question, if you like, elaborate on your choices you chose from the poll. With this discussion, remember that this is personal thoughts and expressions and should be respected. Agree to disagree politely. By no means feel you have to expand on your choices and why, as it's just an option. The following sub-genres are taken from the site Progressive Rock Music Ultimate Discography ... with Free MP3, Videos and Reviews and are defined extensively and give excellent examples of the leading artists for each sub-genre and reviews of thier albums. Here's the list and a few example of the artists that 'define' the sub-genres: Canterbury Scene: Caravan, Gong, Soft Machine Crossover Prog: The Moody Blues, Supertramp, Alan Parsons Project, Phideaux Eclectic Prog: King Crimson, Van Der Graaf Generator, Gentle Giant, Birds and Buildings, Beardfish Experimental/Post Metal: Tool, Kayo Dot, Maudlin On The Wall, Isis Heavy Prog: Rush, Uriah Heep, Atomic Rooster, Porcupine Tree, The Mars Volta Jazz Rock/Fusion: Miles Davis, Mahavishnu Orchestra, Santana, Frogg Cafe Krautrock: Can, Amon Duul II, Faust Neo-Prog: Marillion, IQ, Arena, Pendragon Post Rock/Math Rock: Godspeed You!Black Emperor, Mogwai, Red Sparrows Prog Folk: Jethro Tull, Strawbs, The Decemberists Progressive Electronic: Tangerine Dream, Kraftwerk, Brian Eno Progressive Metal: Dream Theater, Fates Warning, Ayreon, Riverside Psychedelic/Space Rock: Pink Floyd, Eloy, Hawkwind, Ozric Tentacles, Oceansize Rock in Opposition: Henry Cow, Univers Zero Rock Progressivo Italiano: Premiata Forneria Marconi, Banco Del Mutuo Soccorso, Le Orme, Area Symphonic Prog: Yes, Genesis, ELP, Camel, The Flower Kings, Spock's Beard Tech/Extreme Prog Metal: Opeth, Edge of Sanity, Cynic, Death, Voivod Zeuhl: Magma, Koenjihyakkei Most artists can be defined by more than one sub-genre. Choose up to four sub-genres as one choice is very limiting to such an array of musical artists and the complexities, arrangements and musical structures of progressive rock.