[This is interesting. Crowley isn't letting the gesture of kindness go on 'I'm The Doctor' note like before. A neutral reply with a touch of softness.]

I care.

[He cares about everyone here. Ten thought Crowley would know that.]

What you are is irrelevant to me. How you are. How you choose act does.

[You're also his friend. Don't you know that? And even if someone was a psychopath. The Doctor would still care. There's enough hate in the universe.]