It began with LEGO and I moved on to cheap Matchbox military models and Matchbox and Airfix airplanes at first, then I discovered car model kits and was seriously hooked on those so gave up everything else and have been doing cars and trucks ever since.
I don't know exactly when I started but I believe I'm comming up to about 40 years now as I started with plastic models in the early 70's, and I think I have built model cars and trucks for about 35.