NEVER Polarised, you get all sorts of psychadelic patterns on windscreens, and can't see the weather radar ! ( and maybe not the GPS / FMS either, but I never had the pleasure ) Probably blanks out a lot of the 'Glass Cockpit' too if you turn your head. Dunno, but worth thinking about.
Nice thin side pieces to go under a headset - unless you have one of those quiet cockpit ear-bud things.
but if The Rain in Spain still Falls Mainly On The Plain - why do you need sunnies ?
Shoes - no aviation shoe specialist that I ever knew of- what's Special about black shoes ?
Avoid platform soles, and have metal studs placed in the heels so that the Training Captain / Examiner can hear your feet coming off the brakes as you apply full power for take-off. Make a point of this.
Tip: Never admit your mistakes in a self-deprecating sort of manner, the examiner might not have noticed, don't draw attention to it.