It's frustrating for us though when you air your documentaries in Canada, and are quoting ounces, Fahrenheit, yards, etc, since I honestly have no clue what you are talking about. I think it would be a nice gesture for us if you could at least subtitle the imperial measurements in metric or use both, if you must.
Actually Canada isn't as metric as you think. Due to our proximity to the U.S. (and our historical use of Imperial units), we've adopted a kind of a schizophrenic approach to units, and we've grown comfortable with it. Yes, we measure temperature in Celsius instead of Fahrenheit, but I'm sure you've noticed that produce/meat/fish are quoted in lbs (some grocery stores use kg, and a lot of people are thrown off by that). We measure distances in meters and kilometers, but colloquially, we say a person is 6"2' 180lbs (very few people know their height and weight in cm and kg). Our air conditioners are rated in Btu's rather than Watts. Canadian football fields are measured in yards. We buy 2 x 4s from Home Depot. And while our store bought beverages are in 350ml packages, at a bar we buy our beer in pints. Flat screen TVs? The Best Buy brochure says they're 52" instead of 132.08 cm.
In engineering, imperial units are still widely used. In engineering school, we spent 1/3 of a course in first year becoming familiar with both the SI and Imperial systems, and learning to convert between them (i.e. dimensional analysis... it's not as trivial as you think when you have to convert vapour and liquid compound properties, e.g. from SCFM to m3/s, you have to know what the standard conditions are). I think personally it's great that Canadian engineering graduates are trained in both systems.
The fact is, imperial units are just more natural for some things and less so for others. The same can be said of metric... especially for very small or very large quantities (e.g. Intel's 45nm process instead of 1.77165354e-6" process).