I went close to being a Geelong supporter as one of my uncle's was a champion of the club in the 60's before retiring at about the age of 26.
My older brothers were Geelong supporters but young enough to be swayed! We moved from the Mid Murray (Tooleybuc) region in 1970 to a cherry orchard in Wandin (outer east of Melb). This is where fate intervenes! In those days your bread was delivered, and in this case it was delivered by a fanatical Tiger supporter. He swung my brothers, and when i was old enough to understand what footy was, they made sure i was a Tiger. My oldest brother and dad stayed with the cats. Oddly enough, my mum (sister of the uncle) was a Carlton fan as she loved Jezza!
Thankfully the George Harris fiasco at Carlton saw Jezza leave the Blues, and mum jumped on the Tiger band wagon and has been a very passionate Tiger ever since - luckily for her, because she wouldn't get to the footy these days otherwise!
Incidentally, we still know the bread delivery man and last year i asked him how he came to follow the Tigers. He said when his family first came to Australia, he made friends with two kids, one a Blue, the other a Demon so they said "you can be a Tiger"! That was early 50's so lean times for the Tigers. He mentioned thinking as he grew up, "it would be nice to barrack for one of these successful sides like Melbourne" but thankfully he stuck fat or i'd probably be a supporter of an irrelevant club, and spend my time sitting in the MGC members in a jacket with cauldroy elbow patches. Praise the lord he stuck with the Tigers!