These are fantastic posts Mark, and a subject that I'm keenly interested in. I find it fascinating what people collect as all of us have unique tastes, and also what story(stories?) that can tell about the individual.
Something I forgot to mention in my mammoth post above but might have a story of some interest:
In amongst my bubble gum card collection is a complete set of 12(?) Australian Native Bird cards found in White Wings baking products in 1963/4. Though I never confirmed it, I have to assume they were collected by my mother while she was pregnant with me. I have no recollection of when they joined my collection - forgotten by the thoughtless child I no doubt was at the time, but they were kept safe along with the rest.