I am constantly trying to be less negative. Unfortunately, my negative interpretation often feels closest to the truth.

I just got back from volunteering at a conference in exchange for attending at a reduced rate. I worked so much that I was unable to even see much of the conference.

The rational part of me knows that when someone asks me how it was, I should keep the complaints to a minimum and focus on something positive. It feels like lying, whether it is to myself or to others. How do other people get over this? Is my instinct right that it is better to not be/focus on the negative, even if that seems more true?