Probably the six d's of inner turbulence was the last album where DT really put some serious effort to be a little distinctive about the riffs, lyrics and ...well, everything else. Octavarium isn't terribly bad after a few listen, but it's nowhere near the other DT albums (except TOT).. When you first listen to the whole album, not a single song seemed never heard before.. DT never was rich in lyrics, but I think they are getting worse everyday.."I walk beside you" ..a 10 yrs kid can write this in the bathroom in like 5 mins..For some real good Progressive rock, try Porcupine Tree. "Deadwing", "In Absentia" or any of their earlier albums.. DT is getting boring, if they don't do something in their next album, the end is near.