I have been thinking about the following quote a fair bit recently:
Great minds discuss ideas; average minds discuss events; small minds discuss people.
—variously attributed to Eleanor Roosevelt, Hyman G. Rickover, or anonymously
Since having come across the quote, I have found myself grouping social interactions by whether the discussions are primarily of ideas, events, or people. Near invariably, I have found the interactions involving discussions of ideas are stimulating, interesting, and enjoyable; whereas, similarly, discussions of people--in the absence of sociological/anthropological/psychological analysis, which blurs the line between people and ideas--tend to feel hollow and vapid.
At present, I have really only gotten to the point of noticing the connections, and frequently only so noticing in retrospect. I have not, as yet, found a practical application for this knowledge.
Practical, or not, I do feel that it is fantastically interesting to seek correlations between my enjoyment of interactions and the underlying class/topic of discussion.