more 'gateway' questions:

does your family fly often on paid tickets?
(consider Japan/Korean FFPs that allow miles pooling)

are one-way awards important to you?
(consider BD, QF, AF/KL)

are you a low mileage earner (say under 50k per yr incl flights, cc spend
(consider programs with cash/miles component like BA, BD, NW or frequent mileage promo discounts like AF/KL)