Have you purchased all available land? If not, why?

I'm on the second to last row. I don't really need any more right now; I still have a fair amount of room without buying more. I like to save enough money for new levels, so I'll buy more as I need it.

(My neighborhood is rather simple and straightforward, a lot like the one I grew up in. I can't help but think that those 3D designs, as impressive as they can be, use up a TON of land space.)