I think we left part of our hearts in Rome. We kind of went in not expecting to love the big city. But Rome is so different, especially old town Rome, which is where you want to be anyways.
We stayed in an AirBnB, very close to the Pantheon. Just outside was a Piazza and we would watch it go from a farmers market in the morning to restaurants at night. There was always something to watch in our little Piazza. It just made the whole experience that much more charming.