We’ve rented Endless Ocean for the Wii. If you’re not familiar with this game, it’s a scuba diving game in which you explore a small ocean. It’s really open ended. Sometimes the game will suggest a particular location, but you can go somewhere else if you want.
I like that it’s open ended. It requires more involvement in order to enjoy, because you have to make choices and set your own goals, but I like it that way. However, it would be boring if you didn’t manage to involve yourself in the game. I think that it relies a lot on suspension of disbelief. For example, there’s no real danger of, say, being eaten by a huge shark or dying of some other cause. But, on the other hand, it’s still scary to dive deep into a dark hole and find a huge shark at the bottom. But if you didn’t have any suspension of disbelief, that would still be boring, because you wouldn’t find that stimulating, or scary, or cool, or whatever.
Some things like movies or books are also like that, because you also can’t really achieve goals with them, or at least, you have to set your own goals, and they aren’t interactive at all. But, Endless Ocean is still interactive, just not directed. Variety is nice, I guess.