Should a home use series or parallel circuits in their electrical wiring?

A home should use parallel connections in their electrical wiring. There are a number of disadvantages of a series connection. As the name suggests, in a series connection, all the devices have to be connected in a series. This means that either all the devices are switched on or switched off at the same time and there is no individual control of each device. At home, we need individual switches to turn on and turn off the devices as per our needs. In a series connection, there is a voltage drop associated with each individual device and this means that devices may not get the rated power supply. This will result in below-par (or less than the rated) performance of devices. 

For these reasons, we prefer parallel connections over series connections.

Hope this helps.