Good poll.

As said, on the road it keeps my right leg in a position away from the chain, means my cleated foot is put down on the high side of a crowned and debris-strewn road (I've seen too many slips and I'm never that close to a curb because a car will cut me off), and when you ride a tandem you need to instinctively always unclip with the same foot as your partner (and Bubba unclips with his left for the same reasons as I).

Saw a tandem pilot dump his partner over lane divider curb because his right foot slipped. She could have broken her back. I ain't going there. I live in a town with nice wide bike lanes (I'm spoiled) so if I ride close to a curb cars that are turning right have to go to my left. I ain't going there either.