You're my Surly doppleganger.
My dad brought this bootlegged VCR tape back from his deployment in Okinawa when I was in third or fourth grade, and I watched it all the time. I've always thought it was weird that a kid who's only about 7 years old loved such a mature movie about aging and an estranged father-daughter relationship. In my 20s when I got my first DVD and was subbing out all of my VCR movies, I bought On Golden Pond, which included an interview with the screenwriter.
In addition to the four adult actors you reference, Doug McKeon delivered a solid performance as an abandoned child of divorce, who more then held up his own with Henry Fonda. And Dave Grusin's score is fantastic, one of my favorites.
And yeah, as a kid I also loved comedies, actions, and stuff like the Star Wars and Indiana Jones flicks, all the movies that a kid of the 1980s loved. But at an early age I seemed to be drawn to more serious films, stuff like On Golden Pond.