kickcatcher said:
Yet another training gripe, generally universally applicable but to Aikido more than most, is the theoretical extrapolation of ability to defend against attacks not actually trained. For example, what is the Aikido defence against someone who is arguing with you in your face then headbutts you? very real world attack, especially in some places. We can hypothesize how aiki principles could be applied, but unless you actually train some form of defence, its all just talk.
In most self defense situations, IMO, the attack wont be exactly what you train for, no matter which art you choose. The ability to improvise is important in any art. If you train enough you should be able to find something that works, though I admit we've never covered headbutts aside from not letting someone close enough to do it.
PS: I'm sorry about your bad rep, you did what was asked and gave your opinion in a well thought out and innovensive manner. I'd give you a good one to make up for it but I dont know how.