When I got my first new bike, I got the "kickstand talk". I don't know if every little kid with a new bike gets this same lecture, but everyone I've ever mentioned it to recognized it.
"I don't want to see you dropping this bike on the ground. It's got a kickstand on it, and I expect you to use it. This is a nice bike, and I don't want to see it lying in the grass, or on the driveway..." etc, etc.
I don't, to this day, know what the big deal about laying your bike on the grass was. But, also, I still don't like to do it. Every time I do, I expect the 1967 version of my dad to show up and spank me, or something.
I tend to lean my bike against something (a tree, a wall, another bike, whatever) rather than lay it down, if it doesn't have a kickstand on it. Of course, all of my commuters, and a few of my other bikes have kickstands (because they are cool).
So, use those kickstands. I don't want to see you dropping your bike in the grass...