I'm going to resist being additionally pedantic about aspect ratios, which is an act of great restraint.... oh, the hell with it. As a still photographer, I spend more time thinking about this particular subject than is probably healthy. Kubrick used 4:3, which is still technically "landscape" as it's wider than it is tall. My favorite aspect ratio for still frame is 4:5, usually in landscape but sometimes in portrait. I actually don't particularly like 3:2, but I publish a lot of photos in that ratio because I have an aversion to cropping. One of the best photographers I know personally primarily uses square format (via either a Hasselblad or one of several Rolleis). His reasoning (besides generally loving TLRs) is that with a square format camera he never has to think which way to hold the camera, he just shoots. This cuts down on composition time, which is essential for a street photographer using a completely manual medium format film camera, but I digress... This doesn't embed for shit, but you should listen to it. Badger Theremin.