I have been to a gender therapist and their professional definition of transgender is that it is a spectrum which includes any actions, thoughts or desires which are of the opposite of a persons birth gender. With exception to someone doing those for reasons other than personal satisfaction, gratification or relaxation.
So, transgender (which is a noun) fits me as the description given by a professional gender therapist. I have no problem with it, as far as a description anyway.
I crossdress, but why? because I am feminine. I have thoughts, desires and emotions along with actions such as dressing which are of the opposite sex. That makes me transgender according to the professional. I do not identify as a transexual however. There are times, sometimes more than others I desire to look as a woman, perhaps even be a woman. But I do not identify as a woman, and my desires I have do not become so strong that I have chosen to make any permanent changes which align my femininity to my male body. I am somewhere within the middle between a man and woman, or perhaps I am both internally a man and a woman, or just a feminine man who likes t wear women's clothing and other likes that are more typical of women then men.
I do see that the media especially has taken on transgender to be only those who identify as the opposite sex and are transitioning or planning to. They too are also transgender, according to the professional, as transgender is a wide spectrum. But I personally feel that transgender covers just about any cross gender internal feeling or action taken because of it.
Many who CD "chose" to not CD for sometimes decades. The same goes for many who are TS, who fought not being so for sometimes decades. They chose not to express themselves as they wanted to, or who they felt they really were, it was a choice, and now CDers and TS who are dressing or transitioning are choosing to do that to be happier, or free etc etc. The only thing that is truly not a choice is the desires feelings and emotions that are that of the opposite sex. Whatever we do or don't do about it is ultimately a choice.