I‘m born and rise in Mexico (250 miles east from Mexico City), and fortunate enough, we have had football frequently since the 60’s, at that time was mostly Dallas games, so the majority of the people over 50 follow the Cowboys.
That change in the 70’s, so it‘s lots of Steelers, Raiders and Dolphins fans. We use to have 4 Sunday games on local channels plus Monday night, and football was, and still is the ultimate college sport and fills up stadiums down here, so it was/is very easy to follow.
Me in particular, got hooked about 75 or 76 when I was like four or five years old, my dad wanted to gave my older brother and I a Cowboys football set ( helmet , shoulders and uniform ) for Christmas, and the store was out of it, so he had a choice between Dolphins, Steelers and Raiders, pick the first two because of the colors, and gave them to my mom, she wrapped them and put a sticker with a name on it randomly, and of course I got lucky and got the good one. So since then, my brother and I have followed our teams passionately.
And finally for favorite player, I, as everybody else liked Jim Jensen, but for some reason I remember also likening Tom Vigorito, but my all time greats are 13, 54 and 99 with a honorable mention to Cameron Wake and the Mark brothers.
On a side note, I played football for about 7 seasons, and now my son, who I turned into a super Dolphins fans plays in the same team that I played 30 years ago, and fortunately I have been able to take him and my daughter to see the Dolphins a few times (see avatar), with the Miami miracle included.