My old Boeing Seattle instructor told me not to waste my time checking generator cycles, volts and amps after engine start as the generators will not go on line unless the everything is normal.
Re checking of TR's which is part of some operator's procedures. Is that also a waste of time as well? It does not form part of Boeing recommended procedures in either FCTM or FCOM. In short, some pilots are by nature multi-fingered switch flickers while others take a more sanguine view. Surely the operation of TR's is part of a maintenance schedule and therefore superfluous as a pilot cockpit check?