I've used minis since 1981. My dad used to work for the toy company that produced those plastic sets, the ones that came with a 3-d molded plastic setting and a bunch of plastic minis(there was a dungeon set, a field and castle set with moat, and a couple more). So, I kind of had a jump-start. I then got into metal figs in second grade and never stopped. We wouldn't use a grid or map, but would instead play on a big chalkboard, pool table, or other surface that you could draw on with chalk. Dominoes were for corridor walls and such.
I really enjoyed painting and playing with minis in D&D, and used to come up with my own miniature battle rules. But my group pretty much stopped using minis in high school, and we never played with them in college.
Now, of course, we play with minis and battle mats every time. And I dread having to buy and paint new figs; I already have 10-20 pounds of unpainted miniatures. I don't want to use them unless they're painted, and I can't paint them because I don't want to take the time (I'd rather be playing D&D).
That's why I'm so excited about the new Chainmail. Prepainted, inexpensive figures? Sure!
-z