"Great minds discuss ideas; average minds discuss events; small minds discuss people."
Personally, I feel that discussing people does not necessarily indicate a small mind. There is so much complexity in a person, their personalities are so intricate and varied, that observing and discussing the way a person interacts with the world around him could very well indicate a great mind. However, if one simply engages in celebrity gossip or stuff like that, then that is the sign of a small mind. Conversely, if someone is discussing some stupid idea, then that does not indicate a great mind. I think that it is the topic and level of discussion that matters, not whether it is about an idea, person, or event.