After years of playing WoW, we ALL have that one item that just would not drop!!! What was that item for you, and why did you want it so badly?
I remember in ICC I raided as Frostfire. From the second I saw the loot tables on patch day, I could not wait until the moment I would get my Phylactery of the Nameless Lich trinket from Sindragosa. After dozens and dozens of clears, week after week, I never saw it drop. When it finally dropped more than 6 months later, it was loot counseled to an alt mage that had just swapped from Arcane to Fire THAT SAME NIGHT!! Never saw it drop again...=(