One thing that I've noticed with all of the people I've seen who studied with the founder is that they all look pretty different from one another, even those who studied at around the same time. None of them look like the founder in my eyes, really.
My feeling is that this is because they're doing what they can do well -- their own aikido.
It may be a silly question, but why was the founder so good at aikido? I think he was good at it because he defined what was good "aikido" by doing what he was good at doing and calling it such.
Yes, I think that in moving along in our aikido path that it's inevitable that we start embodying the same principles as those who went before us. But, I don't think it's necessary to do aikido that looks like that old guy with the bushy eyebrows and long white beard...
Any way, these are just my own thoughts. I don't think we're too far off in what we're saying; probably more in how we're saying it.