Speed!
I lived in Italy from 1961 until 1963 and flew some control line there. Although there were some excellent stunt flyers, the true passion was speed. The engines of choice were, as I recall, Super Tiger and Rossi.
One fellow had a model of the fastest seaplane ever built, the Macchi-Castoldi 72. It was fitted with two Rossi 15s, each driving a separate propeller, counter rotating. I'm not sure he ever flew it when I lived there but I think I saw it (or one like it) in the video.
If it goes fast, the Italians usually had something to do with it!
On land, speed was defined by cars like the ALFA Romeo, Maserati and Ferrari.
In the air, the MC 72, which flew in 1934, set a speed record for the fastest piston powered plane ever flown. I believe the record stood until the mid 2000s when broken by Rare Bear. As far as I know, the Macchi still holds the record as the fastest seaplane ever flown - 440 MPH average.
It was powered by two FIAT V-12s driving counter-rotating propellers.
Truly an engineering masterpiece!
Bob Z.