Odd phenomenon, in my infant jazz stages I had some great jazz on the shelf (Art Blakey - Moanin') for a year before going back and realizing how good it was. I had to become willing to really listen and learn the language, then things made sense that once didn't. In fact, I am still developing, it would seem. McLean's Jackie's Bag didn't click for me the first few times, now it sounds great.