I do believe the Supreme Court should be fair and balanced.   The last apointment was Darth Beta Ginsberg- a former ACLU lawyer.   To balance that appointment, you would need a right wing extremest whaco to balance the left wing extremest whaco already in place.   That would be fair and balanced.

If Douglas retires you would need a gen-xer to balance the prehistoric dinosaur already in place.

If Breyer retires you would need someone named Strohs, Edy's or Good Humour.

If Souter retires no one would notice.

If you don't like my suggestions, than win an election and pick your own candidate.