I am a great fan of the old Portuguese movies, i own around 27 of them, and i am never tired of watching them.
I like the comedies, like "O Grande Elias", "O Costa do Castelo", "O Pátio das Cantigas", "Cançao de Lisboa", etc, the historic ones as well like, "Camoes", "Inês de Castro", and the ones based on some Portuguese authors like "Amor de Perdiçao", "As Pupilas do Sr.Reitor", etc.
They are great movies, the humour it's the greatest part, because they were produced in an era that there was no freedom in Portugal, but even though we can still catch the meaning of some situations.
The actors were the best, i like all of them, but my favorites are, António Silva, Vasco Santana, Ribeirinho, Curado Ribeiro, Beatriz Costa, Milú, Elvira Velez, Eugénio Salvador, Eunice Munoz, Virgilio Teixeira, Maria Matos.
In my humble opinion there no movies like those, and even nowadays we keep using most catchphrases from those movies, the themes used in them are up to date.