Looks very much like a Citroen C5, but that's just fine. It's a handsome car.
It's called tradition. Same goes for Aston mouth, Mercedes star, Bugatti Grille, Rolls Royce front etc.I'm seriously sick of the BMW grille.
Except the "older than C5, 3 Series" looks like this..
This new 6GC though, is quite good looking, I think the nose works better with the longer wheelbase on this one as opposed to the normal 6 Series.