Building Relationships: Business vs. Personal

Just had a thought - - I think it's very important to build relationships that are sustainable.  I've been in the HR profession for over 5 years and I've grown from a role of administrative support in human resources to a HR Business Consultant.  I have days where I am tried on my experience and my knowledge.  There are days when my phone rings off the hook for advice and direction.  My career has proven to be very therapeutic for me at times.  As I listen to employees, managers and directors voice their concerns about how they interact with people each day, I feel a sense of resolution in my own life when trying to solve problems and think about the relationships that I have with business partners and friends and wonder they consider me as a sustainable asset to them.

sustainable:

1. : capable of being sustained
2. : of, relating to, or being a method of harvesting or using a resource so that the resource is not depleted or permanently damaged b : of or relating to a lifestyle involving the use of sustainable methods

Do you find having sustainable relationships in your life rewarding or a burden?