I live in the US: Imperial is the only system I have an intuitive sense with. My temperature is in Fahrenheit (close to 0 degrees today), driving distance is in miles, my height in feet and inches. However, metric is the only one that is convenient in any kind of science/engineering problem, except if its all relative. For example, psi (or some variant like kilopound per square inch) is fine in a mechanics problem, because most everything there is just proportions. However, in a thermodynamics problem, Imperial is distasteful, and doesn't make sense to me. So, Imperial for life, Metric for engineering.