Your first Prog album?

First time I REMEMBER listening to prog was Pink Floyd, definitely, and it was either DotM, WYWH or Animals.  They were in my father's vinyl collection and I was 5-6 years old(1979, 1980)  going through them and always listening to those.  The first prog album I bought with my own cash was, incidentally, Pink Floyd's Wish you were Here on CD. I was 15 years old then.

Hmmm....I don't think that I have an answer to this question.  I used to listen to pop 40 radio back in the early 80's and I remember hearing Tom Sawyer and Limelight and Owner of a Lonely Heart.  After that I used to listen to a classic rock station so I certainly heard Pink Floyd, ELP, Yes, Rush, and Jethro Tull.  I never heard any King Crimson, Camel, Can, Gabriel-era Genesis, and most other prog bands.  The first prog album I actually remember listening to was when my friends and I listened to my friend's brother's copy of 2112.  We were playing it at 45 speed instead of 33 speed so it really rocked, but Geddy's vocals were even squeakier than usual.  I know for sure that the first Rush album that I ever owned was Caress of Steel.  I would say that that was probably the first prog album that I owned although I may have bought Pink Floyd's Momentary Lapse of Reason before that since I bought that on vinyl. 

An uninspired listen to Wind and Wuthering  in 2002 (aged 14)...

Some elapsed time...

Then a radical, life-changing listen to Foxtrot in 2003.

I remember thinking something like, WHAT IS THIS TOMFOOLERY? WHO KNEW HIJINX LIKE THESE WERE NESTLED AWAY IN RECORD SHOPS ALL ALONG?!

The Yes Album. 1971. Played continually during the two years I spent doing my A Levels.

Thursday night used to be Rock night at the Cleethorpes Wintergardens. In the Court of the Crimson King was played as a theme each week just before who ever was playing came on stage.
Saw Genesis twice there once in 1971/2 at which they played most of Tresspass and Nursey Cryme and then again in late 1972 when they performed Foxtrot.
Sadly after that they stopped playing 500 people capacity venues and I next saw them at Sheffield City Hall. STill incrediablely good but it lost the intermacy.
Also saw Yes at the same venue. 1973 on the Topographic Oceans tour. Was that a blast. Saw Yes there again during the Fly From Here Tour. Good on the old stuff but the new left much to be desired.