Procol Harum - Nightriding

I first started listening to rock music around 1974, which was really the tail end of Procol Harum's career, and I couldn't work out where they fitted into the grand scheme of things. They were responsible for "Whiter Shade Of Pale", a seemingly undisputed progressive classic (which I hated, and - it's the opening track on this compilation - still hate), but they weren't really part of the prog mainstream. Listening to this, I still can't work them out. I hated most of this, although the bluesier songs like "Whiskey Train" and "Seem To Have The Blues" are a bit better. The saving grace is Robin Trower's guitar work, which even, almost, redeems dross like "Ramblin' On".