Is O-Sensei's aikido the best? It all depends on your perspective. Too many aikidoka join a cult of personality wherein one persons aikido is infinitely better the the next. I've seen aikidoka whose flow was something I admired and even aspired to. Then I've seen others whose external power was something to behold. What of internal power. Can it be truly measured? We all owe O-Sensei a level of gratitude that cannot be measured. The same holds true for Takeda. Without daito-ryu, there would be no aikido. Getting hung up on who is the best and who is the worst keeps us from seeking enlightenment in all corners. We can learn from them all.What we choose to do with those lessons can make our aikido better or worse.