And also, I don't really understand the original question. I like 50mm on a crop sensor because it's close to eye focal length. I know exactly how to frame a shot before looking at the viewfinder with a 50mm on an a700, which means i can think less about the gear and more about the composition, which is what i want.
a 35mm on a aps-c sensor is more eye seeing
35x 1,5 = 52,5mm ff
Nah, put up a zoom to one eye, and keep the other open, they'll be the same at about 70-75. which is exactly where a 50mm lies on a crop sensor.
and your viewfinder is 1x yeah right xD
50mm approximates how the human eye sees. In other words, our eyes have a focal length of about 50mm.