I hardly ever idle more than half a minute, and sometimes, not even that long. It takes too long for the engine to come up to temperature when idling, even here in the Philippines, so I just drive off.

Cold running temperatures are very very BAD for your car. That's why it's annoying that some mechanics take the thermostats out of older cars... it's a slapdash solution to overheating that often does more harm than good.