Just happened to be listening to this while reading that...
Man, Metroid Prime was good.
I can basically picture in my head the drops in the visor as i move the cammera to watch the rain falling, Truly Metroid Prime was/is a Masterpiece in all aspects of it's craft, while other games have been recognized by their cinematic storytelling almost rivaling that of movies, i always tought that Prime achieved the perfect gameplay immersion storytelling, and i think that all the hours i spent not only advancing in the objectives but also collecting all logs, expansions, or just standing admiring the enviroment like the rain drops in Talon overworld, the birds flying above the chozo ruins main plaza, the snow falling in the camly phendrana drifts or the chozo statuary and architecture in several areas are one of the most fullfilling experiences i've ever had.
i can't choose a favorite as the music was also amazing and went perfectly with the areas in which they appeared:
But also since the very beginning starts mangnificently with this eerie theme: