After a session I feel happy and energized. Of course, what we Mistresses feel after a session is probably quite different from what the subs feel (which by the way is another great question ).
To answer your second question, the Fortress provides an outlet for fetishes/desires/feelings that, for most people, are kept buried deep inside where the energy builds and festers. I imagine coming here for the very first time for some people would be quite cathartic.
I wonder if subs find that they are less distracted by/think about their fetishes as often after a session. Or the other way around?