As a trans person: Use trans as an adjective, and with about the same heuristics you would for noting some other aspect of a person.

"Cindy is a tall woman" is socially-comfy if it's relevant that Cindy is tall. If you always refer to Cindy as a "tall woman" specifically, omitting opportunities to drop the adjective or including it even where it's not obviously pertinent information, it usually comes across as awkward. If you emphasize it or bring it up pretty much at random even in situations where it's clearly not relevant, people begin to notice the unusual emphasis you place on it and wonder if there's some reason you're doing it: Does Vaniver dislike tall women for some reason? Or find the idea so difficult to take at face value, when paired with the more obvious, mundane, un-adjectived noun that they cannot not notice it? The difference is that since most cis people don't know anyone who's trans and aren't reliably given the cultural context for understanding and including us in their "just folks" category, the fact that someone is trans can seem disproportionately interesting or relevant. Your best bet is to counter for that -- not necessarily ignoring that someone is trans, but not calling special attention to it either.

Different people also have different preferences, of course, but it tends to signal casual acceptance and respect for trans folk to a pretty thorough extent.