I have three shaving methods. Safety razor, foil buzzer, and beard trimmer. I do not own a rotary.
I like the foil better than a triangular rotary purely because of its shape. I can use it on my upper lip easier and there are some spots on my jaw I can hit at a better angle. I only ever use it if I'm being fast and lazy, though. My skin is light and my hair is dark so there does not exist an electric shaver that can get close enough to make the stubble disappear.
I use a safety razor when I'm doing a proper shave. My skin is very sensitive though which makes it difficult to use. Ive not found any foam or gel that works well. The only solution is to stand in a hot shower long enough that my face/hair gets soft from the steam. At that point I don't even need anything more than water, but that's the only situation in which I can get an ideal shave without irritation. My hair tends to be very stiff. Part of the problem is also the aforementioned light skin and black hair, I can't just go over an area once or from a single angle or else it is still visible. I gotta get in there good and go both down and up multiple times.
The trimmer is of course for when I let it get a little too long. Takes off the bulk faster so that my regular razor can finish the job.
I am jealous of people with blonde hair or a lack of facial hair. My blonde buddy can go days before it looks like he's unshaven. Another buddy who doesnt have a lot of body hair can go a week just naturally. Me? Literally 2 hours after the closest shave possible I've already got a shadow. And yet it grows in too patchy/sparse to just let it be a beard. There is no justice in this world.