After you tell me what you're going to talk about, tell me why I should be listening to _you_.
Interesting. I never do this, and probably never will. My viewpoint is that you've already made the decision to attend the talk, so me spending time reciting my bio is just redundant and a waste of time.
Interesting. I never do this, and probably never will. My viewpoint is that you've already made the decision to attend the talk, so me spending time reciting my bio is just redundant and a waste of time.