Learning to change plans without needing group consensus

One pleasure of traveling alone is that I can abandon a museum after twenty minutes and spend the rest of the afternoon wandering a market. Strangely, I still feel guilty changing an itinerary I spent hours planning, as though someone is grading me. I'm learning to treat reservations as commitments but most other plans as options. Have you become more spontaneous while traveling solo, or do you still struggle to let the schedule go?