I'm pretty much with Markus. It's a source of constant irritation to me that Senna got away with so much of his "rough" driving (not least deliberately punting Prost off at Suzuka '90) whereas Schumacher gets constantly hammered for it by so many people and the British motorsport press in particular. Somehow they seem to think that Senna's charisma and latin flair made it acceptable for him where it isn't for Schumacher. Double standards certainly. Ron Dennis's recent interview about Senna where he mentions that Senna felt that Schumacher was "prepared to win at all costs" was such a cheap shot. The founder of the "win at all costs" school was surely Senna himself, from whom Schumacher learnt all his "rough" driving tactics IMO.
Apart from the personal tragedy of Senna's death, the tragedy for F1 is the seasons of Senna vs. Schumacher battles we were all denied 
Michael.