There is a foundation in the country I'm from, it's called Benjamin. The people in it have made up some kind of rules for when a non-cis-person is a Proper Transsexual. They mean that, well, if you haven't hated your body ever since childhood, if you are a transwoman who doesn't like makeup and wearing dresses, if you're a transman who likes to wear pink, then you're not a Proper Transsexual. If you're a gay transman or a lesbian transwoman, you're not a Proper TS.
This kind of attitude is really effing stupid, and ruins stuff for a lot of people. People shouldn't exclude others like this, people should try to be warm to one another and help one another, regardless of how they look, what they wear, what gender they are, etc.