I didn't get to watch Senna's entire career, I do remember his last maybe 2 years. I did get to watch Schumacher's career from start to finish, him with Ferrari and Hakkenen with Mclaren were unstoppable and the battles they had for a win would drive you mad with excitement...I think if Mclaren's cars were as good as the Ferrari's of the day maybe Hakkenen would have some of Schumacher's titles