everyone approaches it a little different. Some treat photography more as a science and its not wrong to do this. There is a lot of science behind it. My only warning with doing that is not to lose sight of composition and the overall feeling captured in a photo.
I get your point, however this technicality-debate started because I asked in the topic-opener on people's opinion on how to reduce the noise I seem to struggle with, by finding the "theoretically" best spacing and method for shooting HDR.
Maybe, as you mention, there's not really any such thing, since it's all about what feels right and which goal you in the end try to pursue. But as a newbie, I guess I'm not really that common with everything yet, so I strive to start from the best starting point, by reading books and asking about other people's opinions, and combining this with my own starting experience.. Maybe I won't do anything like the "theoretically optimal" in 5 years, but that's how I try to start.
This debate was regarding noise-control, and I'm very much interested in what seems to be the best way to avoid this.. Since Slick and I had completely opposite ideas of how to get around this, I think we both learned something new. But in the end, nothing beats the practical experience you mention, I agree..
Personally, as I've mentioned before, with my camera and the things I tend to shoot, I don't see any difference between 5 shots with 1EV spacing and 3 shots with 2EV spacing. This is important for me, because I do a lot of hand-held HDR.
That's how I shoot handheld as well, but I mainly bring my tripod when shooting for HDR.
I think I'll try experimenting some more to confirm that there's actually any difference to be found.. If I come up with something interesting, I'll post it in here..