Big fan of military oval circuits.
Nominal angle of bank used in the climbing upwind turn varies from 20-60deg, depending on the performance of the aircraft, to achieve a standard downwind spacing that enables a landing on the airfield should the donk fail. Finals turn uses 15-45deg AoB, again dependant on aircraft performance, to achieve the required turn radius.
Angle of bank varied for crosswind - more bank when turning "with" the wind, eg upwind turn with a slackening wind, and less bank when turning into it.
Anyone actually got any good reasons for doing square circuits, generally out of gliding range of the airfield and outside even the ATZ?