I tend to keep different sessions open for different ongoing topics, and that's what I notice when I start a new one. It's very easy for it to fall into its default sterile, focus grouped, conversation-flowchart mode.

Longer conversations can draw it more "out of its shell", though. The more context it has, the better it can mirror you, and there's some sessions I have where it genuinely does feel like it's got a little bit of personality and rapport with me.

You really do have to keep in mind, though, that no matter what, in the end it's just going to agree with you :)