It really can depend on the gurl, but as a trans woman myself, I prefer t-girl. As mentioned, “shemale/she-male and tranny” can be derogatory.
Some gurls like those terms as part of a sexual thing, so you will get different answers. For the gurls who like to perpetuate the uniqueness of being trans, t-girl is a good fit, I think.
Finally, there are gurls who don't want to be trans, and aspire to just be recognized as women. Each has a valid perspective.
This type of open discussion is a welcome change to other communities. Thank you for taking the time to solicit our feedback.