this sounds very methodical and mathematical and not very much fun. perhaps one of the disadvantages of digital. with film, you took your knowledge and then mostly just shot and learned even more from your mistakes. spontaneity in photography can bring about some wonderful results. I can't imagine shooting with a computer on hand and spending a lot of time looking at it and histograms. in the 30+ years I've been shooting, don't think I've ever done anything like this. guess I'm old school, cos I'm really glad I learned using film. people learn differently; glad this works for you.
I'll disagree with this viewpoint. All of those decisions are normal and natural for someone (and I include myself in this group) who has not yet truly mastered the art. I've been fortunate to have observed a number of very good photographers (some are pros, some are advanced amateurs) who have assimilated the mechanics of photography to the point that is recedes into their subconscious. They can focus on the creative part fully, because the technical part is already part of their internalized process. I've seen them put together a series of shots in a workshop or shooting session, in a very short period of time and I know that to achieve even approximately the same level of technical quality would take me much longer. When reviewing their shots, we'd ask why they would make this decision or that, and they'd usually answer that that was the right setting, or lighting ratio, or camera angle for that situation. I aspire to achieve that level of comfort and expertise, but it is clear that this level of performance requires both a very sound understanding of the principles, and lots of practice. This is similar to many other fields where skill is developed through repetition and constant practice to the point that the mechanics or basics are ingrained in muscle memory or subconciousness.