Simple advice from Seth Godin on building your reputation:
“A path on the way to building a reputation:
When someone asks you a question, they get an answer bigger than they ever expected.
When someone gives you a project, they get a plan scarier than they hoped for.
When you take on a project, you finish it.
If this is your reputation, what sort of projects and gigs will you find yourself getting? Not a good way to fit in, but an excellent way to be the one people seek out.”
Stephen

..and this is what builds your ‘brand’ (reference to Thing 3 of the #cpd23 things some of the new professionals are working on at the moment, and reporting on Twitter) – not just the name, blog style, colour, etc that you chose =)