Personally, I'd like a feature that allowed us to expand our current house, as I am pleased with the location of our current plot. All of the larger plots don't have the same view and conveniences.

Another reason that I do not find "upgrading" to a larger plot that tempting is that I do not like the interior layouts of the larger plots. Some added control for a customized room layout would also be nice (adding additional rooms, moving rooms, expanding the basement, etc). Being able to move the workshop door to another location would be nice too.