I met a fututre version of myself in the first lucid dream I ever had when I was about 14 years old. At that time I never had known anything about lucid dreams or what a lucid dream actually was. I had surprisingly good dream control and met a very much older version of myself, probably between like 60 and 70 years old, actually. It was an interesting experience because I spoke to the future self and were told many wisdoms, but I don't remember much of them anymore because I never had written any of the dream on paper...