As already observed, much in the Senna documentary was slightly over-emphasized. Though, it did a great job of highlighting the struggles with his personal lifestyle (kind, generous, overbearing charitable work), and his on the track style (aggressive, reckless, and at times, just down right dirty). I was only 7 at the time of his death, but when we weren't racing enduros on Sundays, my dad and I watched Formula 1.
Like everyone else, I didn't understand what happened at the time. Not until the 10 year anniversary was I aware of the Roland Ratzenberger tragedy and the impact of both of their deaths on the whole sport.
Now, my generation is simply over come by him and seems to want to learn more.
To supplement the documentary, watch the top gear tribute.