Research shows that sharing parenting time as close to equal as possible is better for the children. They adjust to their new circumstances better and enjoy close relationships with both parents. Does that mean that if you only have visitation and the other parent has physical custody of the kids most of the time that they won't adjust well? Of course not.
Even as a noncustodial parent, you can interact with your children and remain involved in their lives despite the fact that you don't have as much in-person time with them. You and the other parent may make a conscious choice to structure your parenting plan with one of you having the children more than the other does. This could be due to a variety of factors, including work schedules or the distance between your homes. Regardless, you and your children can still enjoy a close relationship.