Can you help me with ideas about a photo album.

Ok, so I have 3 photo albums that is a set. each holds 48 pictures each.
I can’t decided how to divide them. Should I have one for my son, one for my daughter and then one for us as a family spanning the last 30 years?
Would you include past the years of marriage to include other family members or just stick to the basic family?
Or would you simply divide the books to cover times> Like, 70’s-80’s , 80–90’s, 90’s to now. Most of the photos I have that have some significance was during the 80’s and 90’s. I just want the books to be enjoyable while telling a chronological tale.
I’ve put off doing this for over 10 years and each time I can’t seem to decide.