I think its amazing how far you've come when it comes to city making. I remember those 2-D citys of yours from the old days. While those were not terrible, your new cities are great and just keep getting better and better.
The Mesoamerican set is quite good(all the ones up there are).
Just a question but have you done a Cahokian/Mississippian city set yet? And if not, would you consider making one?