Front brake - left or right?

Why is your right hand stronger?

I do the most wanking, braking, writing and tooth-brushing with that hand. The fine motor skills contained within it are far superior to that of my left hand.

I actually disagree with Sheldon Brown on the subject of brake placement so I,m probably wrong.

On a bike with two brakes, I prefer to use my back brake if signaling (ie riding with one hand). living in europe, I signal mostly with my left, leaving my right to hold the bars and slow the bike if need be.
right - back (to slow down)
left - front (to stop)

My fixed has the brake on the left simply because thats where I expect it to be.
legs - to slow down
left hand brake - front (to stop)

I just swapped my brake from right to left as all my road bikes are set up with front on the left. I'm more apprehensive about riding the bike with the lever swapped than I ever was when I started riding with clips.

My fixies are brakeless, but if I had a single brake I'd put it on left. Polo stick is in the right hand.

CAUTION

When hiring a bike on a Mediterranean island, check which is the front brake and which is the back brake BEFORE descending a large hill with hairpin bends. (Don't worry, it was only a small skid and there was no oncoming traffic. I may have let out a little wee.)

Front brake on the right, rear on the left. That way, the hand with the fine motor skillz can make sure I don't lock up the front in a corner (bad news). Thus leaving my really uncoordinated left hand free to yank at the rear brake like an eager baboon and the worst that happens is maybe a bit of shimmy from the back end (which is always a lil' moment of fun).

Plus, I've been riding like that for so long, anything else just feels wrong.