In short - I think if you keep them in your main living area where the temperature and humidity are relatively constant, you should be fine whether it is on a stand or in it's case.
Long version...
My guitars are American made models (you can see them in my sig below). They are not the most expensive guitars you can by, but the Strat and the LP Standard cost me well over $1k each.
I'm particular of how they are taken care of, but I wouldn't say I baby them. I keep them out on stands where I can grab them on a whim to play them. I learned the hard way to get good stands that has material on the contact surfaces that won't react with the finish. Rubber = bad!! They are in our living room where they can be seen, but are out of the way. I have a small practice amp there. In my practice area in the basement, I have a stand sitting there where I can put it. None of my guitars stay in the basement. When transported, they always go into a hardshell case.
My strat had a music stand fall into it once. Another time it fell face forward onto the floor. It's carpeted, so it wasn't bad. It's kind of like a car - until you get that first ding, you live in fear of something happening to it :-).
Carrying the car analogy further...you ever see those people that park their super expensive car on an angle in the parking lot for fear that somebody will damage their car? They live in fear of their precious car being damaged. How much can you really enjoy it? Might as well keep it in the garage.
Much like I would never own a car that I lived in fear of it being damaged, I won't own a guitar like that either. I buy my guitars to play them, not keep them as museum pieces. My LP is still pristine and I'm in the "please don't let anything happen to this guitar" phase. One day, I'll bang it into something or knock something into it. In a way I look forward to it so I can get it over with...because I know it's going to happen. :-).
Dings and stuff on the guitar can also be like scars and are part of your story as a guitar player. You can reminisce about your war storys :-).