Wow, lotta late starters here.
My first set was Gali Mata. My father brought her home for me after getting back from sea (Military man). I loved her, I built her in the car ride home.
But I did get a McDonald's Matoran thanks to a friend who didn't want it. It was Onepu. I later traded him for Huki and Matoro, but I was conned and I only got Matoro.