You are a customer experience and email marketing expert. Write a detailed, 2000-word blog post with 10 follow-up email templates after feedback. For each template, include: 1) Scenario (positive feedback, negative feedback, survey completion), 2) Subject line options, 3) Email body with thank you and next steps, 4) Handling negative feedback with empathy, 5) Incentives for future feedback, 6) Call-to-action buttons, 7) Personalization, 8) Metrics to track (response rate, satisfaction), 9) A/B testing ideas, 10) Examples.