Call me sad if you wish but my honest answer to this is that whatever aircraft I am doing a pre-flight check on is the most beautiful aircraft in the world. However, when I am not doing a pre-flight and just observing, Concorde is the mutts nuts. I even felt a lump in my throat watching those last landings.
However, if I'm doing a pre-flight on a Cessna 150 or whatever, Concorde could fly by at Mach 2, missing my arse by inches and I would'nt give two figs.