The wheelchair thing really is an interesting idea; it would add a whole new dimension to the game. With the depression angle though, you're on very sensitive ground. I'm not sure I'd feel comfortable if that actually was a feature in VF.

I also agree that pets should be more than just walking furniture. They should also have some kind of lifespan and have peeps upset when they die, or able to play with the dog or stroke the cat for a mood boost.

A family reunion would also be really good.