Individual Scrapbook or Family Scrapbook

My question to all scrappers: ONE family book or stick to individual books? I have 3 kids to keep up on. I worry that I will run out of space to keep all of the books. Right now I have at least 9 between them. I am about 6-9 months behind for each child. If I cop out on the individual books, I can always make 12x12 copies and create more books in the future!!