I have been a nurse for almost 14 years now.  Its a very rewarding profession. 
I agree, you must be big help to ndividuals, families, and communities around you.
I try to be. I've had jobs from the NICU, community health nurse, Pediatric nurse, and home health surpervisor.
So you must be quite experienced in providing home care to patients of all ages.
Yes, I was actually a nursing supervisor over a bunch of nurses who did home health care.  My favorite job was working as a nurse in the NICU with the tiny babies.  Its amazing how far medical technology has come that we can save the lives of tiny ones.
So would you say you are mostly working collaboratively with physicians?
In the home health job, yes.  In the NICU I was just a regular nurse though I did mentor others when they got a job there.  We did everything from administer medications and IVs to feed and bathe them.  I wanted to be a nurse since I heard of Florence Nightingale.
Yea i think home care is probably a big role for you since it focuses on treating illness to improve quality of life of people.
Yes, Its so vital to continue good health care even when people go home.  I think it helps their recovery to be at home too.  I know I would rather be at home than in a hospital.  I wonder how many nurses there are now?
Well, in the United States there probably over 600,000 nurses in a state alone!