sdav: I find it simple. Car indicating left = turning left (maybe, I will still wait lol). Car not indicating = straight through, turning right or left and have forgotten to indicate. Either way I'm not pulling out in front of a car that doesn't indicate. It's not like cars are required to signal that they are going straight every time they pass a side road.
Fair point. Three+ years of driving heavy vehicles left me with a very cautious indicating habit - failing to briefly signal right as you enter the roundabout leads to a lot more people shooting out in front of you from the first exit, and when you have a gross weight of up to 30 tons cautious indicating habits help a lot. Maybe I'll trial leaving the first step out now that I'm a car driver only!
I still have a hard time seeing why some of you find it so annoying - if I am indicating in this manner, it is only for a very brief moment as I enter the roundabout, merely to signal to the drivers at the first exit that I am heading past their exit. I cannot see how this would hold you up at all if you have to wait for my left signal regardless - my left indicator is coming on at the same point in the roundabout either way...