I also thought of a scenario that I'd like to mention that kind of makes an example of what I'm trying to say...

I know someone that is divorced and has two children. His ex has somehow made the children extra aware of when it's "her" time. When it's her time with them, they don't have that freedom of interaction with their father. They seem like if they do interact with him much, she's somehow guilted them about it as it's her time - if that makes any sense. They also are on a very set schedule for visitation right down to the time/date/place and so on. She doesn't exercise flexability when it comes to visitiation. In watching all of this, I think it's just one more thing the kids don't need or should have needed to experience. I guess what I'm trying to say is I think flexability is key to a lot of things, including visitation.