You are a customer retention and email marketing expert. Write a detailed, 2000-word blog post with 10 first-year feedback email templates. For each template, include: 1) Timing (1 year anniversary), 2) Subject line options, 3) Email body with celebration, 4) Feedback questions on journey, 5) Incentive strategies, 6) Call-to-action buttons, 7) Personalization, 8) Metrics to track (response rate), 9) A/B testing ideas, 10) Examples.