My discovery of Mahler happened about a decade ago when I was in my late teens. Prior to that time, I had begun my exploring of music online with the intent of expanding my knowledge from a historical as well as technical standpoint. I sampled music from a variety of genres, and "classical" was on my list of things to try. At the time, I enjoyed novelty and chromaticism. Recently I heard discussion on radiolab of research that indicates our brains have certain features which seek to make sense out of even the most discordant patterns in music, and it is that process of making sense that some people find exhilarating. To give an idea of my musical sensibilities, I greatly enjoy late era Coltrane with all of its seemingly chaotic and frenetic structures.
Back to the topic at hand, my first Mahler purchase was almost Kubelik's M1, due to the raving reviews on Amazon, but I was intrigued by the differences of opinion regarding Boulez's CSO M1, with some regarding it as cold and analytical and others finding it to be cathartic. And so it was, my first exposure to Mahler came through Boulez's interpretation of M1. Like others, I too was fascinated by the grotesque nature of the third movement and found it delightful. Back then, I was only interested in symphonies, and I had an aversion to vocal and choral pieces. Therefore, I avoided M2, 3, 4, and 8, plus the songs. Looking back, how foolish of me! For M5, 6, 7, and 9, I decided to stick with Boulez. They were only digested in small pieces. I remember particularly enjoying the first movement of M9. Over the years my musical tastes evolved, and I went through any number of fads, but I always came back to Mahler.
Over the past two years I've started to develop a more serious appreciation and a closer relationship to his music. For the first time, I was brought to tears by M2 and M3, (Walter NYP and Chailly RCO), and Boulez's M6. I recently received the EMI 150th anniversary box set, and have made it just to M3, but will press on. If I am ever to learn any music in great depth, I think it should be Mahler. My thoughts aren't well organized, but it is hard to imagine a more genuine expression of hope in the face of reality than I've found in Mahler. It is heartwarming to know that people from many different backgrounds have found a common source of joy in experiencing this music.