We're hundreds of times smarter than the ancient Greeks and Romans -- and by "smarter," I mean we have vastly greater information available to us. And yet, I'd jump at the chance to go visit them in their time and place. Why? Because I think they were still pretty sharp, given their constraints. They did some pretty impressive stuff. Additionally, human nature makes for interesting drama, regardless of the level of technology. And that would map on reasonably well to any alien civilization capable of interstellar travel and communication with us. In other words, they'd have to have some order to their society, which we could learn in time. They'd likely have some form of metaphysical belief structure, and possibly several competing structures. They have to communicate somehow. They have to have advanced understandings of math and science. These are all things we could learn from them, or at least about them, just as an ancient Roman could learn to use a tablet computer, if they really wanted to. An advanced civilization would know that we are capable of advancing, and that would make us interesting to them.