Same here. I've never ridden motorcycles, nor lived in England. But when I set up a bike with side pull brakes, I let the front brake dictate how I route the cable. If I get a better line with the front brake cable going to the left side, I'll do it.

It's only an issue, I think, if you habitually brake with only one hand(which is good practice; the rear does nothing but wear out the rim). I habitually brake with both hands (a habit I have not been able to break).