No it's negative, because claiming is information, and information should be controlled. It's why people don't like Flower doing it unprompted just to clear herself, much like what you've gone for here. If information is not controlled, we limit our ability to use it to solve. And furthermore, with your flavour scum can now begin to deduce what sort of role you may have, such as whether you have one, and what type it can be. And there is no benefit to this for the town, because as you say, it's just flavour, it doesn't prove your alignment. So under the presumption that you're town, you've taken action that can hurt the team, at the cost of something that doesn't really help move the town wincon forward.