While I do have some dispensers from my childhood I really began collecting when Pez released their bug dispensers. I don't know what it was, but I was drawn to them, and went on a nice little hunt to get them all.
From there I just went crazy. I don't buy all of them, but if I find cool ones or cheap ones I pick them up, and I also tend to get some once in a while for gifts. This is also one of the few lines that I occasionally have to get shipped to me from other countries as apparently Pez hates the USA.
The mini Pez from Japan are especially cool, however they have stopped making them apparently.
My collection so far: