A lively group discussion, an intimate tête-à-tête, an inner monologue — in your view, when it comes to a good conversation, what’s the ideal number of people?
Most of these are the source of good conversation. With the right group or friend the conversation might be astoundingly good. I belong to a writers workshop where most of our conversations are interesting, informative, and funny. Even better are the conversations that happen as the group is breaking up and the comments are more witty and teasing.
The one on one conversations with friends and acquaintances support healthy thought patterns and problem solving skills. A good friend who spends an afternoon teaching me to knit socks is a friend indeed.
My inner speeches tend to be with the characters who live in my head, and they are sometimes helpful in areas other than writing. After all, they look out of these eyes too, and can sometimes see things I cannot.
There is no ideal number. It is situational as much as anything else.