You are accurate with this list. If you are with someone and have as little a doubt or cannot be your authentic self, then you need to have a self check.
On the other hand, I don't very well agree with point 8. My argument is that a person might not want to introduce their partner to their family because they want to be sure about where their relationship is headed. This is not enough an excuse but still...
Also, maybe the person had had to introduce their ex(s) in the past and it did not work out. For fear of what might be, they may choose to thread cautiously.