I think mine are less warnings of what's to come and more a cautionary tale that makes me appreciate what I have now. My other self made some fairly serious mistakes, and happened to be in the wrong place at the wrong time, too. It just makes me even more determined to hold tight to what and who I love.
The newbies probably think we're all crazy, but maybe with time they'll figure out what we're all going on about. It would be an interesting collection of data, though.