The thing that impresses me, is that Morphy predicted many of today's engine lines in his games. His opponents obviously never played that deep.
It's one of the most interesting and impressive facts about Morphy for me. How many times modern engines say to make the move he made, and in such strange positions, and odd lines. It's almost unheard of. For that amazing reason(and a few others) I think he is easily the most 'legendary' chess player of all time, and maybe the biggest 'freak of chess nature'(or however you wanna say it)
The thing that impresses me, is that Morphy predicted many of today's engine lines in his games. His opponents obviously never played that deep.