He's going to ignore her initial comments. He already knows that much and being told again that he doesn't know what how to spend the currency of value Mary placed upon his life.

"I'm rather famous in my world, too."

The whole dying and coming back to life thing not withstanding. He stares at her hand for a moment and finally reaches out to shake it.

"Sherlock, please."

Not that he doesn't answer to 'Mr Holmes', but that will always be his brother, after a fashion. "Since I took my blog down, you mean John's blog, right?"