By pronounced do you mean defined? I've noticed in a lot of shaving videos, the men have more mass around their chins than I do. Lately, my shaves have been going exceptionally well, aside from some irritation (a caveat here to state that I've had about a dozen and a half shaves). Shooter's advice is what has worked for me. Pay attention to which part of the blade you are shaving with. Instead of trying to use the full blade on your neck and chin, use the heel or toe of the blade. I've found that by limiting which part of the blade I use, I gain a real feel for each particular area of my face. My neck hair lays left to right, what I usually do is skip the ATG and do XTG passes instead. First, a simple neck to chin shave. The second pass goes at a diagonal angle. For example, it starts at the corner of my jaw and ends up somewhere along my jaw bone. This stroke seems to catch the hair somewhat ATG. Again, I'd stress short strokes using the part of the blade with which you are comfortable for this pass.