I had a prog phase, but it turns out I was a lot less into the stuff than I
thought, because I could barely come up with 15, and I only have 6 artists
represented.  And of course there are definitional issues; what counts,
exactly?  I don't know.  A lot of what passes for prog, I just never could
abide-- Tull, Moody Blues, Kansas, Styx come to mind.  I mean, I HATE Tull
and the Moody Blues; I don't know why.  But apparently I like Yes.  Never
listened to Genesis.

Tales of Topographic Oceans, Yes
Wish You Were Here, Pink Floyd
Discipline, King Crimson
Close to the Edge, Yes
Relayer, Yes
Yes Album, Yes
The Power to Believe, King Crimson ('03; over-enthusiastic?)
Initiation, Todd
Trilogy, ELP
TR's Utopia
The Great Deceiver, King Crimson (live box)
Dark Side of the Moon, Pink Floyd
Animals, Pink Floyd
Fragile, Yes
Phaedra, Tangerine Dream