Whilst this may be obvious, those girls who move smoothly and gracefully with good anticipation, around the court tend to have really nice legs (not necessarily long, but nice). Those with a forceful, lunging, driving style tend to have chunky legs. I think amongst my female friends who are really good at badminton (open grade), they are roughly split 40:60, 40% really nice legs, 60% in the other group ;P
Pecheur man you are obviously not talking about Oz players then. I have been discribed as watching a a rhino on ice skates when I play singles ......