Before I "listened to jazz" I owned a few LPs: A Love Supreme, Black Saint & The Sinner Lady, Ornette!, Where is Brooklyn?, New Grass, Mingus^5, This is Our Music, etc. When I made a concerted decision to really listen to jazz, I bought Brilliant Corners and then these all at once: Out To Lunch!, Unit Structures, Ascension. Jumped off the deep end, I suppose.