I think that's one of the first things you learn as a therapist....not everybody is going to find you worthy. Not everybody is going to like you. Some people won't come back. Some people just won't "get it". Or maybe they see your process and delivery and don't want to get on that ride.
And then there will be those others. Those people who define counter-transference. Those people who move you as you make an equally important difference in their life. Those people who look forward to your insights. Those who's light seems to have turned on. Those who see you as a guide in the process of self discovery.
I can't remember everyone I have worked with. But you do not forget some who have challenged your core, made you better. Those who brought you to your talent and aided in your delivery of parallel processes. Those who have your ultimate respect for human survival and excellence.
I work hard to not forget the pain of others. Allow them to feel it. Give them the respect to own it. I can't take it home with me. It is not my process. I am the guide, the vessel, the confidant who feels honored to walk with many on their journey. As I allow those close to me to walk next to me on mine. We are all a part of the process.