How do I chose domain for authority site

Dear,
We prefer to recommend new domain because it is easy to build a good website working from scratch. Developing an old domain into higher authority site is difficult because old domain will also bring its old bad things with itself. Try to build a new image from new site.
It will give you more confidence because you will build it with our own hands.

i prefer to start with an old domain, however sometimes it is so difficult to find a good one. In case I need to register a new one, I never use keywords in the domain name and try to find a good brand name for my authority website.