I really enjoyed your piece, Mr. Peck. You have retired gracefully, satisfied with your career and grateful to your students and colleagues. The testimonies here from people who know you validate your story and suggest that you have been too modest. Your words show well-earned wisdom. Younger educators should note that your compassionate description of teaching makes no mention of test scores or school rankings. 
These days, when opinion leaders frown on the very idea of retirement, it takes a certain courage to express satisfaction with a 30-year career finished by choice while it was still going well. I wish you well and I know that a person like you will be liberated not bored by retirement.