What are your favorite Classical LPs?

Deutsche Grammophon issued a 250th anniversary, Beethoven box set containing every piece of music he composed.  118 CDs & 5 Blu Ray DVDs.  I own about 200 classical LPs but find myself returning to this box set all the time.  If someone has an interest in classical music but it's not going to be their mainstay listening, you could almost let this box set be your entire classical collection.  Yes I know there are many other composers, but LVB does it for me.  This is a great addition to any collection.  

The one that is currently on my turntable, or in my CD Player.

Definitely this LP. Og version is really up North:
https://www.discogs.com/JS-Bach-Mischa-Maisky-Martha-Argerich-Cello-Sonaten/release/2683524