A lot of very interesting viewpoints on this subject, and I see a bit of my own in many of them.
I have done a bit of scratchbuilding with very little references at the time, but was happy with the result. Now I have heaps of photos, and there is a mass produced kit of the subject. I am a bit disappointed in some respects, because I don't really feel my model captures the essence of the subject in many ways, but on the other hand, I learnt an awful lot of techniques and gained a lot of experience building it.
I really just like to have a finely detailed model that looks right, and to have learnt a bit about the subject in the process. I got into modelling through a love of history, and they perpetuate each other nicely. To "rivet count" though, would require far too much extra time and money, of which I have neither!
I do love reading about such projects in mags, etc. although.
It has to be fun and relaxing, otherwise it is just another stress in your life.
And, like Pix, I have no time for anybody who puts down another persons work for selfish reasons.