Is this a kink or just D/s in general?

Well, kink is usually a specific action or thing that creates arousal or some form of attraction. To me, it seems more that you are very interested in the mental aspect of D/s relationships. So I dont think it is a kink, though it is a very important thing for learning and appreciating your submissive, sir

This is a normal part of a healthy relationship whether it be vanilla or domme/ sub. How else are we to learn about each other and learn what our subs need and they learn what you need?

I don’t think it’s just a normal side of being dominant. I love when my dominant shares what they enjoy about the dynamic as well. The trust being built goes both ways.