How many people are looking for someone who knows what you do? Now… how many people are actually looking for you?
So… if you wish to be found on the Internet for what you do, why would you buy your name as a domain name and put a blog on it? You may not want to. Buy a domain name that first reflects what you do. Until folks know who you are, this is how they’ll find you.
When you get enough content and following, Google will take care of letting them find you.