What is the most rewarding part of being a physical therapist?

I am not a PT, but I am a PTA (Physical Therapist istant) so I do a lot of the same things treatment wise as a PT can do. I decided to go into physical therapy as my career because I had PT when I was in high school and saw how much it helped me. The best part is just helping people get their quality of life back, doing things as simple as just walking or standing that a lot of people take for granted everyday. In PTA school it really hit me even during just practice in cl when we were learning gait training (teaching people to walk) just how rewarding it truly is.