I got started modeling when my mother introduced me into it. I had built about 40 1/72 scale planes and 11 1/600 scale warships in two years, (from age 7 to 9) when a kid named Emmanuel moved in down the street from me. He was my age, and had almost twice the models I did! He also built strictly 1/72 scale and 1/600 scale, and, his models were painted!
He taught me how to paint the models and rig the ships, and then when D&D came out, we made a bunch of rules and hit/damage tables similar to D&D, and we wargamed: my collection against his. He usually won, mostly because his collection was bigger.
But everytime I got money, I always went out to see what I could get to best him, while he did the same. We had a mini Arms race going, and we'd build together at his house, and then Wargame on weekends.
I got into 1/72 scale Armor when a year and a half after Emmanuel moved in, another kid named Jason moved in. He had a collection of models almost as big as ours combined!
I think he'd gotten some from his dad or something. One of the reasons his collection was bigger was because he had about 15 1/72 scale tanks and about 2-300 1/72 scale troops. When he Wargamed with us, he would defeat us because he had an Army, and we didn't. That's when I started building an Army to beat him, and helicopters to counter his tanks and move my troops behind his!
That's how I really got hooked on modeling, during those heady Arms race days with Emmanuel and Jason! Ah, those were the days!
Now, 890+ kits later,I build now because I love to build and I love to share my work with appreciative friends. Still, waaaaay back in the back of my mind, I'm kinda hoping another Jason comes along that wants to 'fight' his collection against mine, so I can kick his butt!! :-)