That interest is more important than explaining oneself.
But it is an interest that comes naturally and does not have to be feigned.
It then becomes important to that person that he or she does what can be done to make a good impression on that other person.
He--or she--wants to be liked, and, possibly, loved.
Everyone should look forward to having fun, rather than finding—at that moment and in that place—the person they will want to marry.
But not infrequently, a couple may be strongly attracted to one another on the first date.
Of course, what strikes one person as interesting may not seem so to someone else.
I think it is reasonable to try to determine what is interesting to the other person; but it is not reasonable to submerge one’s own interests entirely.
Another thinks, “I am strong.” Or “I am reliable,”—or kind, or thoughtful, or knowledgeable, or caring, or resourceful, or gracious, or any one or two of a number of different ways of being.
So, naturally, during these times when two people are talking to each other about everything, but especially about themselves, they are trying to paint that picture.