Hi George. I do agree there is a high degree of subjectivity in deciding colour rendering. However olours do depend on the nature of the processes causing them. Blue nebuale as I understand it (and I could be entirely wrong!) are reflection nebulae arising from reflection of light from of a nearby star by small dust particles as these latter have a size range similar to the wavelength of blue light thus these wavelengths are reflected more strongly.
That be as it may, what we get on our pics I'm sure also relates to conditions at the time down here on Terra-firma, hence we get different results not only between ourselves but within our own photos that we take from time to time.
Whatever, in the end, they're our pics. and we have the right to to have them however we like best. I like mine with some blue, you prefer your red. That's fine.
Incidentally, this is the histogram of my latest effort. Shows a pretty good RGB balance - I think.
http://cdn.astrobin.com/images/thumb..._histogram.png
Wouldn't it be wonderful if our eyes responded to colour as well as they do to white light. Image how spectacular the night skies would be without having to resort to cameras.
Robert