Would you rather be in a loving relationship with no children, or a single parent?

This question is somewhat aimed at older people. What creates a lifelong fulfillment, children or love? I am married to a great man, who is much older and done having children [vasectomy]. The marriage is wonderful and the love is strong, but I am left wondering if I was meant to have children of my own. This is a huge fork in the road in my life. In retrospect, what meant more to you?