In terms of exposure -
I would rate Half Dome as the most intimidating. Margin for error is minimal and your brain knows it. This always instills trepidation and fear in me. I realize there are safety cables and wooden steps. But a slip and fall could prove instantly deadly.
MR - Exposure is minimal. Without snow and ice the final 400 is an easy and fun class III scramble. Only a few spots where a slip and fall could result almost certain death. It can be a bit intimidating when you first drop back into the chute from the summit. But once you are taking a few feet at a time instead of looking at the whole section, the fear is quickly overcome. Of course all this changes when snow and ice are present and it can quickly become a mountaineering adventure only to tackled by people with complete mountaineering skills and training. I cannot compare to HD in this case because you would never catch me trying to summit HD with cables down and ice/snow on the granite slab.
Angels Landing -
Minimal exposure and class II the whole way. A fall in any of the approach and summit will not likely result in death/serious injury. The exposure can seem intimidating as you approach from the subdome but the actual climbing sections are well routed and protected. The whole hike can be done without hands, but the handrail chains are a nice comfort and add a nice protection feeling.
Results may vary from hiker to hiker - just my .02c worth.
HD - 3x
MR - 27x
AL - 1x
