I have more than one favorite. Glen Miller and his orchestra Limited Edition Vol. 1 in hard case, Meatloaf Bat Out of H**l, Simon and Garfunkel Bridge over Troubled Water.
Some treasured ones are originals from my Grandfathers collection (about 50 records in all), as well as a Tribute album to the space shuttle Columbia's first launch with records from the NASA launch center, the shuttle crew, Ronald Regan making a speech about her first launch, and songs. It was made right after her first launch, long before the disaster.
I also have some fun ones from when I was a kid: The Smurfs, The Pink Panther Country Album, and the California Raisins.
And I remember Heavy Metal, cool soundtrack.