I would have to classify ELP as progressive/classical jazz-fusion rock. They are among very few bands that have placed little importance on lead guitars which has been important for rock music. They are among my favorite bands including rush & genesis. Very few 3 piece bands exist. ELP had a knack for filling alot of space without overproducing. Trilogy is probably my favorite ELP album as it is the most consistent in mood & concept. Tarkus in 1971 (prior to trilogy) was a little quirky at times with some filler 3-4 minute songs not well executed by this epic creating band. This album is filled with long tracks except for hoedown (copeland remake) & the sheriff (crap). The album starts of with the endless enigma which is a muscial interlude with acoustic strings leading into emerson's synths. From the beginning is probably one of their ELPs best radio friendly attmepted tracks & uses a more traditional acoustic guitar formula. The sheriff is okay but forgetable. Hoedown is a well known ELP track but is very organ dominated which gets old fast. Trilogy is one of my favorite ELP songs & it's lyrics & moog patterns are hardened by its 5/8 tempo. Abaddon's balero (instrumental) begins with soft moog flute notes over a repetetive snare drum pattern & slowly develops into an epic emotional musical saga. Lake's voice is much more emotional as he uses more ranges of octaves to elicit drama. His bass work is unaggressive but he plays some great rhythm guitar patterns & one great lead solo in trilogy. Emerson uses much less hammond organ (which I prefer) & focuses more on moogs & other synths but trilogy, like every ELP album, is dominated by his classical music-influenced style. Carl Palmer's drumming is okay to fair to moderate but he retains his traditional classical-jazz fusion style which complements the mood of the album. My complaint about palmer, especially in the studio, is that he never overplays. All in all a great ELP effort which is more balanced than it's predecesors but retains it's emerson driven classical style. Slowly, thru the mid 70s, ELP became balanced.