I doubt that them being transgender has much to do with whether or not they're pleasant. Just like everyone else, some people are pleasant, and others aren't, and it has little to do with their gender.
Also, people are not pleasant or unpleasant universally to everyone -- this is relational, and depending on whom they're interacting with. The people you think are pleasant means that you get along with them, but surely they don't get along with everyone on the planet, and some people will think them unpleasant. Similarly if you think someone is unpleasant, this doesn't mean that there aren't droves of people that think they're wonderful.
People are not consistently the same to everyone.