The one thing you haven't got is to remember that audio is slower than reading text and can't be skimmed, and any given page may have lots of userpics - especially if there's lots of comments. These add up to keeping the description as short as it can be while still leaving it meaningful.

I agree wholeheartedly with this :) Do you think it would work if we restricted it to one or two descriptive words and the username? Gaspodia's swirly icon or Gaspodia's swirly blue icon etc.