Of course one of the most irritating things with Canon cameras is the way they set their auto ISO speed which is something you use all the time .. In Nikon it is the logical choice .. auto ISO tries to get a shutter speed >= 1/focal length with a pre-set minimum .. so if I use a 200mm it is 1/200+ .. if I set the minimum as 1/60sec and I use a 16mm lens then it won’t drop below 1/60 to 1/20 for example .. in Canon it is not the case .. they use an obscure algorithm and so it is very random and has no relation to the focal length you are using which is absolutely crazy and goes against all photography rules .. but Canon users have got used to living with it by setting a maximum and minimum ISO and minimum shutter .. this obviously is not good because if I set a minimum 1/60 for a 70-200mm lens I may end up with 1/60 at 200mm because the camera thinks so ..
Something else Nikon does well with auto ISO is that it sets Auto ISO to be up to 2 stops either quicker or slower than the focal length .. i.e. if you have VR and want a slower shutter speed than 1/FL you can have 1/100 @ 200mm or the opposite 1/400 or 1/1000 at 200mm if you are shooting something moving .. this doesn’t exist in Canon .. you have no control over what Auto ISO is at all and that is a major flaw that people keep moaning about all the time ..
The third thing is that inspite of Auto ISO .. if you are in A or S modes you can still vary the other variable i.e. A in S or S in A just by turning the main dial to vary the ISO without having to press any ISO buttons as well .. so it is the opposite variable on the opposite dial always .. and that is very useful and quick because you don’t have to take your eyes off your target you just turn one of the dials and hey presto the other variable changes .. so if I am at f4 and the speed according to Auto ISO is 1/200 and I want it to be 1/1000 I just turn the dial and I have high speed .. this is not in Canon either .. so Nikon cameras have better practical controls that you use all the time .. they are extremely user friendly once you go deeper than the shell or the skin as they say ..
Also, if you use Manual Aperture and Shutter then Auto ISO sets in to keep the exposure right for the set A/S .. i.e. if it becomes cloudy or sunny during the shoot yet I want all the pictures to be f4 and 1/60 then the ISO varies to keep the exposure right for these settings as much as possible .. of course if you set it in cloudy weather and becomes suddenly sunny or the opposite then you will have to change your basic settings .. but it is important if you are shooting a group of photos and want them all to have the same DOF and speed for the same look and effect .. Canon does not do that in Manual .. in manual you have to set your ISO as well .. So whether 6D, 5D or 1Dx they are all the same irritating settings .. baseline I would like to have a Nikon camera with a Canon L lens ??