Actuay USA is not imperialist, Canada is.So you're what, a monarchist?
USA kicked out the King in Civil war, while Canada still has a Queen.
Apart from joke, we should not have prejudice against any system. Every one feels comfortable in the system he has grown. This is similar to native language or mother tounge. Everyone feels comfortable using his native language.
I personally feel comfortable in all systems, as I have used all of these:
FPS (foot, pound, seconds)
CGS (centimeter, gram, seconds) - now abandoned in favour of MKS.
MKS (meter, kilogram, seconds)
SI (international standard units = rationalized MKS)