Also a huge difference between summer temperatures in, say, Galicia and Andalucía. Siestas make some sense in somewhere like Sevilla when temperatures top 40 degrees and it's hard to do anything anywhere that's not air conditioned, and particularly manual labour outside, but in Coruña when it's high 20s to mid 30s at most it's just not the same. (Although climate change is dragging both of those top temperatures up, so perhaps the siesta will start making its way north out of necessity...)