I was both foolishly dismissive and underexposed to Shosty's music as a whole for many years; having listened to and found the Kammermusik too often histrionically morose, even morbid and tiresome. I listened only to the 4th symphony with any kind of ear and found that unsatisfactory as well...
I was deep into the writing of my own symphonies when I took a chance on the "Shostakovich Great Symphonies" compilation and once again not being wild about the 4th (and outright mortified by the 7th) I hit the 8th and everything changed; now HERE is a great symphony with so much to be gained upon repeated listenings! I went crazy reading up on and listening to it over and over again.
My next loves came in the form of #s 10, 11, 13, and 15. Those convinced me Shosty was undisputedly a truly great symphonist, at times capable of great feeling and supernaturally cool orchestration and counterpoint.
I soon after went cuckoo over Violin Concerto no 2, and am looking forward to trying out symphs 1, 2, 3, 6, 9, 12, and 14. I even went further nutso and bought the more recent Petrenko recordings, and am waiting on a Barshai cycle as we speak.
I wonder if I was meant to discover this great composer right at this point in time; a horrible last five years had left me uninspired and full of depression and angst. Shostakovich helped me out of that.