To me, the word 'interesting' is teetering on the edge of usefulness. Earlier, when someone used the word, you could assume they found something worthy of curiosity. But, in many instances now, the word is used in a politically correct sense, usually as a response to the question: "so what did you think of that?"
If you don't possess the mordant wit of Dorothy Parker or the honesty of a child, you hem and haw and say: "Oh, um, it was interesting. Quite interesting.".
And "interesting" becomes consigned to the scrap heap of pointless patter.