Add me to the list of people with fussy babies that grew into charming, pleasant children. I think "colicky" in infants more neurologic than behavioral. A better barometer, I think, is behavior at age 3 or 4, when they are testing limits and can truly understand consequences. If, at that age, they know at that age that "no" means "no" and that tantrum won't change the situation, you're good to go.