Only thing to add DP to your third drawing is that the crosswind turn can be earlier if required to fit in with others in the circuit; the run and break is essentially the same thing but the crosswind turn starts immediately you are abeam the downwind numbers and might start at a height lower than circuit height (usually so that you can lose speed in the resulting climbing turn). Run and breaks have been discussed here before but essentially are a bad idea at an uncontrolled airfield...
Tim