This wasn't my favorite theater season. Yes, it had the sublime Fun Home, but more often I felt mixed about the just-under two-dozen shows I saw. I enjoyed parts, but not always the whole experience. So here's my "Six Best Theater Moments in 2015."*Fun HomeThe Shows:1. Fun Home"Circle in the Square. Previews began on March 27, still playing. This transfer from the Public Theater shattered me. …