For me it is Moods For Marvin Gaye - Let's Get It On, now obviously is my opinion but to me that was the absolute peak of him, in terms of charisma, live performer, vocals, songwriting, great transformation as well, when from the clean shaved pretty boy to a more serious artists, it was a brilliant

This is going to be a fun thread, he has such a diverse audience which is cool, but anyways, favourite period throughout Marvin's career?