In a word - "catharsis"...
That, and the feeling of serenity in having found a community of kindred spirits that totally "get" who/what I am, with the added bonus that I, in turn, totally "get" where they are coming from.
A place where "Leslie" can roam free and be herself without fear of censure, ridicule, or the need to conform to rigid societal expectations of gender expression based solely on birth sex...