I'm getting a little bit better at reading N vs. S.
One thing I noticed about N's is that they are very curious. They like to say things like "I wonder if", "imagine if", "what if".
Sensors tend to go more past or present oriented, talk about things that have already been done or are currently be done. (They are easy for me to tell, too.) I'm still not an expert at reading this but that little trick is making me better.