[dfbldwn]

Getting a 135mm (even more narrowing of background than 90mm) for a kit that already contains a 75mm makes about as much sense as getting a 90mm for a kit that already contains a 50mm.

28mm, 50mm, 90mm makes a strong kit for the mainstream

I prefer 40mm, 75mm, 135mm
because I hate the way wide angles squish the midgets' heads when I take snaps at the circus.

The 135mm is easier to focus in fast moving situations than the 90mm, probably due to smaller aperture when wide open.

You have understated all the advantages of the 75. I've read "short throw" from others. For the distance range of 3.5ft to infinity, its the shortest throw I've ever seen in a Leica lens, with the exception of the 50mm 2.8 collapsible (new).

I'm unsure about your "human perspective" description. I find the results to be more telephoto than not. Definitely far tighter framing for my normal shooting distances (2m to 3m) when compared to 50mm.