Like Ruston, my only regret is not having a time machine to go back to the pioneering era of electrical crafts when men were real men, dynamos were real dynamos and distribution board neutral bar screws were real distribution board neutral bar screws. I've done all the modern equivalents but not quite the way I would like to have done them - wired stages but not with salt-water dimmers, wired churches but not with PILC cable, fitted up generators but not steam-driven DC ones. etc.
In reality things would not be quite as easy as simply winding back the clock. I enjoy having a hand in all aspects of electrickery from design to bending conduit, the first to earn my keep and the second to keep in practice. Back then, there would not have been the choice, as the men in the drawing office didn't get their hands dirty and the sparks weren't allowed in the drawing office. I would miss that and probably have to keep jumping back into the time machine to switch roles.