Three out of my four bikes are left hand shift. One down five up on two of them, one down four up on the other. The odd man out is my '76 Sportster. It should be a left hand shift, since Federal law mandated that starting in 1975. It was when I bought it in 1980, but I soon converted it to right hand shift. Harley's "solution" to meeting that new Federal mandate was somewhat less than satisfactory for the first two years but, thankfully, it was quite easy to switch it over to the right side.
A lot of folks ask me how I manage to ride both configurations without screwing it all up and hitting the shifter when I want the brake. It's funny, though, I have never had a problem. I don't even really think about it. I must just flip some subconscious switch when I hop on the old Sporty.
