I always unclip ny right foot at traffic lights. It's the easiest one to click back in if you're right-footed. Does everyone unclip the dominant foot, or do you do the kerbside foot?
I taught myself to put my right foot down to reduce stress on that knee from the first push on the pedal when starting off.
I'm reasonably ambifootrous as a result, which comes in handy on tandems. I suppose that means my right foot is naturally dominant, but interestingly it's my left leg that I tend to stand on (my legs are unequal lengths, and I tend to alternate between bearing the weight on one then the other, rather than b0rking my lower back).
I'm better at mounting from the left, though I can do it the other way if it's convenient because I'm in
ABROAD or a car park or something. I'm surprisingly uncoordinated at wheeling bikes from the right; this extends to lifting bikes in and out of the dangly bike spaces on trains.
Widdershins brake levers might as well be break levers. I like to think I can cope with the typical tadpole left=front left, right=front right arrangement, but put me on a slippery surface and I'll clearly start to favour the left.