Personally I think that manga should be kept original. However the artist meant for it to be viewed, thats the way it should be kept. That's why I'm againts flipping.

For example in Japan people read from right to left, right? Thats how the mangaka format their work. Those manga should be kept in those format.

But I live in England. When I drew my own manga I do it in the Left to Right format because thats how it is here. If a company say, wanted to publish it in Japan, I would be against the manga being flipped in order to meet the Right to Left convention. Because the art would look different. Not what I drew.

Oh dear, I hope I'm making sense. ^^"

So basically, what I'm trying to say is keep the art original. That's what's important.