My first three were records given to Peace Corps volunteers by Atlantic Records my father directed in Swaziland (Eswatini). One of the volunteers didn't like them and gave them to me: Thomas Bell and the Contemporary Jazz Quartet "Another Dimension," Leo Wright "Blues Shout," Slide Hampton "Sister Savlation," mono copies. I still have them.
When I came back to the states I heard "Filles de Kilimanjaro" in the library and bought a copy of that, then "Bitches Brew," "Miles Davis at the Fillmore" and "Live/Evil." "In a Silent Way" was probably next. Then I started going further back into his catalog and following sidemen on Blue Note, Prestige etc. as well as moving forward into Weather Report, Return to Forever, Mahavishnu Orchestra etc.