Yes, Marie has an established look: long hair, beautifully expressive dark eyes, a very subdued color palette (neutral shades - brown, beige, black, gray, black with dark blue or purple for evening clothes), a fabulous smile, and a ready, contagious laugh.
Joachim looks happy when he's around her, no matter what they're doing, it looks like a feeling of contentment and being relaxed.
They look like they enjoy each other's company and sharing a life together - wonderful pictures, be they formal or the most recent taking their little son for a ride in his pram. All very natural, how nice...