I have had encounters with a certain kind of being as far back as I can remember. The ones I have encountered most often spoke English, though I know some can speak other Earth languages. They also have their own form of communication that I cannot understand, but it seems very effective at communicating large amounts of information very quickly, and is often inaudible to me.
These beings are curious about us, but I wouldn't say fascinated. They are often amused by us, and are always observing us though we may not be aware of it.
Their appearance is often very pleasing. I think many of our legends (for example, Sirens) originate from our long contact with these beings. In fact, when I am around them, I find I can look nowhere else but at them. Strangely, this seems to please many of them.
Having had many conversations with these beings, I am forced to conclude that they have a logic far superior to our own. I have often tried, and always failed, to follow the paths of their reasoning. Strangely, when I tell them that what they are saying is illogical, they seem to take offense.
But what are we going to do? I mean, we can't live with them, we can't live without them. Now I'm off to tell my wife that I think she's an alien.