Often the first recording that I listen to becomes my "standard." This is the case with Ozawa's BSO M2.
It was, I think, my third Mahler recording, the first being Kubelik's M1 (which I love), second being Solti's M8 (which did not become my "go-to" M8).
Back to Ozawa's M2, I get a thrill from the storminess of the first movement, and still get a wonderful jolt when the violin players bang their bows on the music stands (or whatever it is that makes that "extra-musical" sound).
Lately I've been looking for a reasonably priced box of the BSO/Ozawa Mahler Symphonies. Not much luck on that front.