(So this has got to be the worst query of the series, and in the interest of interest itself as applied to writing answers, I'm going to stipulate that it doesn't need to be taken in the way of trading places, of ceasing to be yourself and being someone else entirely in the same terms as a child who wishes they were someone other. If your answer is to be taken that way - fine, but I've personally lived a singularly unique life and cultivated the fallow soil of my soul with high quality bullshit and all sorts of beneficial fungi, and I would willingly trade places with no one.) The person I'm most proud to be a member of the same species is Kurt Vonnegut - if I here he I would be most careful not to change a single detail. I wouldn't mind being Martin Heidegger, so I could do a few things differently and fix his biography in a few key places. Or I would change places with The Great Cheetolini, and kill myself while I'm him; totally worth it.