When I was a kid there were two party boats (day-trip fishing for you land-lubbers) in our harbor that were old PT boats. I loved PT boats as a kid. Later, one of several tour boats was a new boat made to look like a restored PT - they called it the PT 109 and took tourists flying around the island in it. They even made the exhaust loud so that it was pretty authentic.
I know it's silly, but I also grew to love PT boats when I was a kid by watching McHale's Navy.