Things I've missed from Third Edition:
- The non-binary dice results. I keep trying to find ways to bring the "succeed but something desirable happens" or "fail with a benefit" into other systems. This was so much gold in our sessions and led to the players surprising me with their own twists as to what happens with the results.
- Fatigue and Stress. These, more than hit points were the real currency at the table. When players got close to passing out it was pretty awesome and led to some fantastic role-play.
- Chaos Star results. We got to a point where if stars were rolled the players insisted something happened in the scene. I don't know why but they loved seeing their characters really squirm. They, more than I, would come up with the perfect "oh shit..." moments. Glorious