What should you say when you don't know what to say?

Fair question. Considering I almost never gave feedback to writers, and when I did it was like one line, half the time something inane like "Guh," I am not one to talk.

It's just now I know what it feels like to GET feedback, I'm thinking... maybe people like I used to be, just don't know.

But if you CAN'T, well, that's different! Just saying you like it is good. :)