1977 was a huge break-out year for John Travolta with the monster hits Grease and Saturday Night Fever bringing enormous financial success both at the box office and from the purchases s of the soundtracks.
I confess that I saw both these films whilst sojourning in exotic locations. This caused me to suspend all critical faculties such that I adored both films.
If I had to pick a favourite it would have to be Saturday Night Fever and in particular its gritty back story. I was also partial to its disco beat and dancing.