To you, what is a Pro Blogger?

What is a professional blogger? What characteristics do they possess? I'm trying to become as close as a pro blogger as I can, and I need some ideas on what makes you want to read a blog, and what makes them pro. Thanks.

In my eyes, updates every 2 days. Some sort of community/site and coding posts, and alot of links going towards that blog.

Being a problogger basically myself, it can be hard to give advice on what it takes, but Coldfusion is partially right. Persistence, consistency, and a love of writing about a subject will get you most of the way there. The rest is luck, timing, and the ability to promote what you have written.

I'd say good writing skills and regular updates make a blogger professional.

The check that ticks in every month makes a blogger professional.