Like you said each to their own. Often people think in terms of a multiple for their lenses i.e. starting from the widest lens they multiply the focal length by a factor of 1.5 (or 1.66 if you want more range). So 90, 135, 200, 300 might be one progression for x1.5 for example. Or if you start with 72, 110, 150, 240/250, 350/360. For example, I find for me 110/125 is a sweet spot for moderately wide and I use that FL a lot. But that is a personal choice of mine. For 4x5 I typically head out with 80, 110, 150, 200, 300 and I usually drop the 80 unless I know there is a super wide shot.
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