Living and (occasionally) driving as I do in Manado, darkest Indonesia, where things take a while to catch up, we are set up for left hand driving but it's all a bit theoretical, mostly on minor roads we drive in the shade, and overtake on whichever side suits. It's perfectly okay to pull out onto a busy road in front of whatever's coming, it's whatever's comings' responsibility to slow down. It's all rather organic, relaxed, polite and Indonesian, anyway it works somehow and there are remarkably few car accidents. Recently a set of traffic lights were installed at a quite busy junction quite near us which had always worked reasonably well; the traffic backed up for hundreds of metres, so they turned the traffic lights off and all returned to normal.
We are in fact 'expected' to employ a driver, so we do, (he's also the gardener) and I don't often drive myself over here, and enjoy it when I do. When I drive in the UK and everyone drives in straight lines, one behind the other, it feels weird.