Although I'm not out to many people yet, enough know to where I can answer this question; the easiest to tell was a friend of mine who, upon saying that I needed to tell him something, the first thing he said to me was "wait, are you trying to come out to me as trans?!" At the time I don't think it was that obvious, so I thought that was pretty cool. The easiest to be out to is my girlfriend who has by far been the most helpful and supportive, beyond what I would ever expect of her. Everyone besides these two have given me a pretty rough time though, so far.