Re: to look at opponent's eyes or not?
In the tradition of Hikitsuchi not looking in the eyes is one of the important goals in training for tori.
It is not so easy in the beginning, but it avoids awaiting the attack and prepares for drawing in uke.
In my experience looking at uke while doing the technique often results in unsufficient movement and positioning. I.e. the shoulder facing away from uke is often not in the correct position, if tori looks even only from the corner of his eye. In kote gaeshi and nikkyo this makes the difference between correct and incorrect technique especially when one doesn't rely on pain or muscling through the technique.
Not looking also may help to "forget" uke.