Have fun at what you do.  It will be reflected in your work.  No one likes a grump except another grump!

We all spend many , many hours doing what we do.  It is much more pleasant to spend those hours with people who have a bounce in their step and a smile on their face than with those who mistakenly associate professionalism with being sour and dour.  

I enjoy what I do.  I like working with others who feel the same way and I believe the work product reflects this.  

I know our customers appreciate a team that enjoys what I does.