My definition of what matters goes along the lines of doing what we do to the best of our abilites, with sincerity and geniune attention. You do that right? Some of it you get paid for, and some not. You could look wistfully at those whose jobs are defined as important, but since they arent your forte, it wouldnt really matter, right? Finally, I couldnt agree more with reframing your contribution as described by Chris Edgar.
Sincerely,
Trina