If you'll get 1/2" drive chrome sockets, get them 12 POINT both regular and deep. Some most probable scenarios that you'll be needing them:
1- actual 12 point bolts (clutch, drivetrain, cv axles, hubs etc)
2- using them with ratchet or a breaker bar in a real tight space, then 12 pt will be superior in terms of access and swing angles
3- hammering them into rounded bolts, studs and damaged wheel locks, effectively using them as bolt-outs. Again 12 'jaws' in the socket will grip much better. (But avoid the 'surface drive' stuff in which the peaks look rounded. just get good old sharp edged craftsman-like stuff)
4- If you get larger sizes (20-32) shallow, you can use them as pressing adapters for ball joints, bearings, bushings etc. Again 12pt sockets are 'rounder' inside then 6pt ones, they simulate a smooth circle better...