actually I think that for experienced aikido people, the important thing is the mind, and preferably an open one (not literaly!
Someone who has been training for a long time has tested the flows, power (not strength) and form. he might stick to one or another and of course that will be effected by his/her personality and will effect the way they train or teach.
Yet, I think, that at all levels aikido people should notice how aikido enters their everyday life (and it does), and also be open to other styles or ways of practice.
I find myself seeing high grading teachers, even visiting ones, that are great at technique, but are in a way 'short sighted' to anything new. They refuse to see other things than what they do, and I don't think that's right.
Anyone can be wrong, and we learn better by accepting other peoples opinions. I think that is also part of the aikido.