The other week I was standing in line at the Moab City Market. The woman ahead of me was buying some sort of alcoholic beverage. I didn’t recognize it and admittedly don’t remember what it was. The cashier was sharing with her how she wasn’t really impressed with it. She said, ‘Let’s call it… interesting.’ That caught my attention.
I guess, like 'sure,' there are times when using it can be good. It all has to do with inflection. Mostly, however, I tend to feel like using it is dubious. Not to be trusted. Next time you throw out an idea and get a, ‘Hmm, that’s interesting… ‘, listen to the inflection and draw your own conclusion. And if you use it yourself, play it up a little with an adverb to make sure the other person will actually believe you, heh.