I'm a terrible buyer/collector/hoarder of sunglasses. Obviously aesthetics are subjective but in terms of outright quality, it's very hard to beat Serengeti.
I'm currently wearing a pair of their polarized driver's lenses in the car which are spectacularly good for driving (amazingly
) and a pair of non-polarized 555nm lenses for general non-car wear. Both are excellent - glass lenses, solid construction and fairly classically styled (although they do both lenses in a multitude of styles).
My poor Oakley, Ray-Ban, Persol and Oliver Peoples are mostly confined to the drawer these days.
Some examples of the Serengetis I have: