The biggest takeaway I have from this and other Civ forums over the last 20 years is: don't build buildings. Call them white goods, or infrastructure, or whatever, the consensus advice in Civ4 and Civ2 was always to build units (or wealth, in Civ4) instead of most buildings. In Civ4, it seems the only building that is worth it in almost every city is the Granary, and maaaaaaybe the Forge. Assuming standard settings and standard BtS, of course. You'll likely want Libraries in a few places, and Barracks, and depending on your victory condition, you may want/need some other buildings to unlock Cathedrals, Oxford, etc. Walls, Markets, Grocers, Banks, Aqueducts, Colosseums, Courthouses, Harbours, and most religious buildings seem to not provide enough return for the hammer investment, in the eyes of many. What changes would be needed to these unloved buildings to make you want to build them? Would a +4 Aqueduct be any better? A Bank that provided +100% ? I'm curious. And I wonder, also, if anyone has made a 'infrastructure mod' that makes infrastructure more appealing to build, by making buildings cost fewer and/or produce more output.