Are there any worlds you never use?

With only one active family that lives in Willow Creek I make it a point to regularly utilize all the other worlds. I have community lots and retail establishment in most worlds. My sims have friends and relatives in all the residential worlds so there is a lot of visiting and socializing. They regularly take vacations in the vacation worlds.

If I had to select my least used world it would be Forgotten Hollow. I only have a memorial park there and Vlad's house.