One of my best friends has worked as a nurse for 20 years. She doesn't have any kids of her own, so she puts a lot of herself into her job and her patients.
She worked in the operating room for a few years and acquired the surgical nursing skills she needed for the job, but found that she really missed ongoing patient contact.
For her, she liked working every day with her patients, and found that to be the most rewarding part of her job.
One big benefit of becoming a nurse is no matter where you live, it isn't hard to find a job. Because she doesn't have any family responsibilities, she is looking at becoming a traveling nurse.
This way she could combine her love of nursing with her love of travel and visiting different places.