I have actually already met two others of myself, and spent quite a bit of time talking to them. One of them is so very much alike to me that it's almost impossible to tell the difference (others in our system used to read his LJ as well, and they would have to double-check the name on the posts to check which one of us had written them). We think alike, we write alike, I suppose we must look alike too.
The other one was less like me, but his background wasn't quite canon so maybe that wasn't so surprising.
Meeting them wasn't creepy or weird though. I expected, beforehand, that I would hate any other versions of myself, because I don't really like me very much, but I didn't. It was more like meeting a long-lost family member than meeting my own self.