Are "altruistic" and "narcissistic" antonyms of each other? The opposite of altruistic is selfish. I can't think of a single word that exactly conveys my impression of the opposite of narcissism, but in this context I would use the phrase "Interested in the behaviour of other people."
Thus, you could have a blogger who blogs for selfish reasons but blogs about the behaviour and affairs of a wide range of people because they are interested in other people. This is how I view myself: I blog because writing out my thoughts helps my crystallize my thinking and ultimately manifest changes in my own life and career. But while I blog about my own work I also blog about things I observe that interest me, and many of these things are concerned with other people.
Thus, you could have a blogger who blogs for selfish reasons but blogs about the behaviour and affairs of a wide range of people because they are interested in other people. This is how I view myself: I blog because writing out my thoughts helps my crystallize my thinking and ultimately manifest changes in my own life and career. But while I blog about my own work I also blog about things I observe that interest me, and many of these things are concerned with other people.
That's my story and I'm sticking to it!