I lOVE the incidental music used on the show. I would buy a CD release if they ever did one. The Cincinatti episode used loads of it to great effect. Also, I love the opening to the episode where Marcia teaches Molly to be more out going. I always crank the music up as Marcia walks through the house before talking to Mike and Carol on the stairs. And another, the end of Kattcho where the kids run out to stop Mike and the music kicks in...I always turn the volume up there too
I think the music does help make the show. None of The Partridge Family music sticks out in my mind.