You're going to find this particular topic very opinionated. As Julie Marie stated, you will have responsibilities beyond simply being in their lives; it may be a long road to travel and require extensive patience, understanding and confidence. This, primarily deals with the children's attitude and behavior. Some children may accept and respect you right away, while others not so much. If you don't mind the work and love children, go for it. As for me personally, other factors would need to be determined as to whether or not I'd consider it.