The combination of having a thick, curly beard with somewhat sensitive skin unfortunately, does not allow me to comfortably shave against the grain regularly. I’ve learned to comfortably get very close to completely smooth, but I can always feels the slightest bit of stubble especially if I’m shaving daily when I rub my face against the grain. If I skip days or go several days without shaving, the shaves are always closer and even more comfortable.
My story - somewhat sensitive skin, "copper wire" beard. To get a BBS I have to give it 3-4 days rest. Then I get glass-smooth shave. Luckily, I only shave about twice a week, so always go for the ATG / BBS, comfortably.