We did Paris-Rome-San Gimignano-Florence-Venice. All were amazing. We stayed in Florence three days. Could have spent less time there. Only got two days/one night in Venice and wish we had more, but glad we squeezed it in. Food was obviously incredible.
It seems no one eats breakfast, just coffee/cappuccino, then a ridiculous lunch with multiple courses, and then a ridiculous dinner around 8 or 9 that goes until midnight or later. Lots of really good, cheap wine.
Thanks to all for the helpful info.