I use an angled ATS 65mm Swaro but may go straight if I ever upgrade. I do find I have less neck strain when using an angled for long periods, and having them lower to the ground is nice too for stability, even if it is just a few inches.
One thing I haven’t see mentioned is durability. I feel like I need to be more careful with an angled when cinching down my pack to keep from torquing the eyepiece and damaging it. It seems that a straight eyepiece would be easier to keep ‘in line’ with the pressure when you really torque down pack straps. Hopefully that makes sense.
Maybe it is just me being too cautious and in reality is a non issue…
