Introduction: Having workouts that clients do not dread. We as trainers have a service to provide, and should want clients to look forward to it. I personally don't want my clients to feel like they're paying a "bill". I want them to feel like there paying for something that they're excited to do.
The transition... Seeing the body change, and confidence grow. That's what every trainer should enjoy. Watching you and especially the clients hard work pay off.