First post in many months (l-o-n-g story).
I struggled with ATG on the neck for a while, but now do it daily with no problem. It's a combination of preparation and technique - I spend a few minutes making sure the beard is really well prepped with hot water and a lot of brush action. I have a little spot under my chin which is particularly tough, and once I can feel that the whiskers are softened there, I know I'm good to go. The technique is mainly confidence: I was tentative at first, thinking that an ATG pass would be difficult, and of course I ended up suffering because I was frightened to commit. I tend to shave with a fair bit of pressure, and I think (that's) helpful for ATG as it reduces the risk of the razor skipping. My shaving angle is on the steep side but I don't consciously vary it - I just commit to it with a firm pressure and a bold stroke. But if I haven't prepped enough, I'll be in strife - so I never skimp on the prep.