Back in the early 90's, my brother an I were bored and started using our model Knights in armour to play battles with, ie, we'd move the figures 4 inches across the table and when they were touching base to base, we'd roll a dice each, for each of our models and the highest roll won.
We were also making model planes and ships as well at the time.
Then our other brother came home with a Wood Elf (painted) and some Dwarves that a friend at school had lent him and we loved the look of the models, so that's how we got started.
My brother (the one who had brought home the Wood Elf) got WH40K (the second edition? It had the Blood Angels Captain with Powerfist on the front and had 2 Space Marine Tactical squads and 20 Ork Boys, 20 Gretchin and a cardboard Ork Dreadnough-now a Deff Dread and card scenery in the box). I started on a small High Elf army and our youngest brother started on some Night Goblins (cos he found their crazyness entertaining).
After school we stopped gaming and collecting and reading White Dwarf for a while until 2 years ago, when I went into our local GW to see how things were compared to "our day" as it were and things had changed gaming wise a fair bit, but some things were the same (basically move, shoot, close combat was still in the same order), had a quick game in store, spoke with my brother about it. We both then looked online at the GW models and fell in love with them, then Mum got us both the Black Reach game, he got the Orks, I got the Marines and the rest is history.