I've only been doing Aikido just over a year myself, but I think being the "new" person can be very intemidating.
The thing I find most difficult is training in something like Kote Gaeshi. They are told not to resist but enjoy the exercise. So when it comes to the point that I put on the lock they are all stiff.
So being the good hearted person I am I dont put it on. So then they say to me, but in "real" life.... blah blah.... I can only think to myself "be that stiff with me in real life and I'll break you".