Quick story: I'm left handed and when I was about to start taking accordion lessons, my Dad ( my teacher) asked me if I wanted to learn left handed. I was 6 yrs old; what did I know. I said, let's do it the proper way. But I always thought there were left handed accordions out there, but had never seen one. My wife and I have taken numerous trips to Italy and on one trip in 2010, I cam across a fellow busking in Firenze with the treble on the left side. I was ecstatic; I finally found a left handed accordion; until I got closer and realized he was playing a regular PA upside down. Oh well.... I suppose if you've never played the instrument and started to learn upside down, it wouldn't be upside down to you, nor would it be odd. I, on the other hand, have always played with the treble on the right and pretty much everyone in this forum.