We're often told that we don't know what we've got until it's gone, but some people in our lives can make themselves very easy to appreciate. This is despite the fact that they have a relatively small role in our lives.
In my case, there's one bus driver I see every morning who actually waits for me when she pulls up to my stop and sees me in the distance. Most understandably drive by, but she gives me a chance no matter how far away I am.
And there's also no rule that says this special one has to be human, as one mailman learned from meeting a particular dog on his route.