The 123 minute digitally restored version is the most complete, and has the original soundtrack. I would say it's maybe more for film students and fans though: missing scenes are replaced with action cards, which significantly slows the pace, though it does make the plot a lot clearer. That is the version the trailer I posted is for. The 90 minute original American VHS release (also available on DVD) is the one most often critically discussed, and is probably the easiest to get hold of, not to mention probably the easiest to watch for someone accustomed to more modern films. All versions that I know of play too fast: in the original US release in the 20's they cranked up the projector speeds by maybe as much as 10 frames a second as a cheap way to cut the films run-time down, and this seems to have been maintained to some extent in every subsequent version, probably because no one actually knows the speed at which the original was cranked. It's surprisingly hard to determine without a soundtrack. Not to mention that running the film at 16 or 18 fps would make it almost unbearable to most modern tastes.
I don't think that the 'closeness' of male characters has so much to do with changing social norms (though this is a future viewed through the lense of Weimar Germany) as it has to do with the exaggerated expressionistic acting style used throughout, similiar to Nosferatu or The Cabinet of Dr. Caligari. Every emotion is over-emoted; its an extension of stage acting techniques of the time, and also probably has something to do with the relatively low fidelity of cameras of the time for detail, combined with the heaviness of the make-up everyone is wearing.