@Fa5t3r - That's what we learned when I did a short course on writing biographies. The mistake a lot of people make is to try and just write out anecdote after anecdote without tying them together into a greater narrative. It's better to find an underlying thread and concentrate on that than to try and stuff every single interesting thing about a person into a single book.
If people wanted to know the facts, they would look up the Wikipedia page. If they want to know the story, they read the biography.