Hum... to me, there are two different kinda of "standing."
1. standing because it has a "wide base." so when my bag is riding shot gun. It isn't going to fall over during a sudden break.
For example: I had a LV Beauburg (sp wrong) and it was a simple book tote with no offical bottom. It is very structured but it is very "tall" so whenever I stop for a light, it falled over. Then, I have to go looking for everything on the bottom of the seat. When I go to a restarant, it won't sit steadily on the chair by itself. I eventually sold it.
On the other hand: LV Speedy has a wide base and it will "sit up" because it has a wide base. Bal Twiggy doesn't have structure, but when I sit it down and it has stuff in it, it will stay "up."
2. standing because it has structure. LV Epi Speedy, Alma, etc. They just stand up because it has structure.
So I like bags that "stay" where I put them. I don't want to worry about people bumping and knocking them over. So I guess, yes, I like bags that doesn't "fall over" but not neccessary "structured."