As an 80's anime kid, I remember when I first saw Castles in the Sky and My Neighbor Toro Toro. It left lasting impressions on my world views of flying robots and bus-shaped giant cats.
But Princess Mononoke straight out floored me. The surprising heaviness and violence felt like they backdoored a complex film for adults. In Japan it was the highest grossing film of ALL TIME until Titanic came along.
My growing years have been enriched beyond measure by the Ghibli/Miyazaki films. May my curiosity and joy of trekking hidden paths be the legacy of Studio Ghibli.