I often find myself responding with "interesting" when I haven't yet formulated an opinion - to me it's an indication that I'll have to get back to you on how I

I often find myself responding with "interesting" when I haven't yet formulated an opinion - to me it's an indication that I'll have to get back to you on how I feel about it. I haven't found another synonym to use as a response, and I often catch myself constantly saying "interesting" over and over. It's interesting.