My MIL. DH is one of five and all five are great--kind, funny, compassionate, successful in their chosen careers.
Of course, I have no idea what her life looked like day-to-day back when they were kids, but she is 80+ and still fun, hilarious, and beloved by her kids. She also had a nice career in public health until she was 72.
I can't imagine having that many kids myself but she basically had a baby a year for 5 years, so they're very close in age.