What a minute. The perspective of a full frame camera is always "flatter" than the equivalent F.L. in a crop factor camera whether your shooting in digital or film. I found that out when I started to use my RD-1 in conjunction with my R3-a . A 35mm on the 1.5x camera is roughly equivalent to a 50mm on the film camera, but after moving around to compose the foreground subject in the same way (subtend the same field angle) , the background perspective has changed considerably. Thats why all those point and shoot pictures look so wide open; its almost impossible to get a shot that looks anyother way.
And whats this business about certain focal lengths having a kind of mystic quality? Christ, tell that to the medium format guys and they could hardly take a picture. Look, focal lengths be focal lengths...thats all. Different lenses for different applications in different formats. Their is nothing sacred about any particular focal length. Sure, I have my favorites within a particular format but when I use a new format I often find I don't like the equivalent focal length as much as I did in the original format. Personally, I enjoyed moving into the 1.5 crop factor arena as it transformed my existing lens collection into a new set of tools to use and explore with.
No accountin' fur taste
Rex