To take a shine to someone is to have a fondness for them, and in this context the speaker is saying that it's because the person is sunny and cheerful that they have taken a shine to them.
Context: I think it's your cheerful and optimistic disposition that's made me take a shine to you, I say as I reach out and catch the hooks and pass one over to constance.
Hypothesis: I think it's your sunny nature that's made me take a shine to you, I say as I reach out and catch the hooks and pass one over to constance.

Is the hypothesis incorrect? (Yes, no, or unknown)?