Story is probably the most important to me, which I feel is tied closely to the characters. If the characters are one-dimensional, their story will be, too. I find This is Us to be a knock out of the park on both accounts. I don't think I've ever separated the two in my mind.
One thing I want to share that is maybe weird: I love watching reality television because I feel like it is studying writing, framing, and scene planning. Obviously these shows (Real Housewives of wherever, Million Dollar Listing, etc.) are heavily edited to follow story arcs. And sure, the people are lured to a certain beautiful backdrop and told, "Hey, talk about what happened last episode." But I think it's good to watch to see how real people--not characters--behave, speak, and follow story arcs. That's what I try to bring to my stories.