I just wanted to add my two-penneth.
I agree with SearchFunction (post top of page 6 of this topic), I'd like to see the various 'toothed' technic pieces... 6x1 plates with a hole at each end, plus items like the toothed half bush (Part 4265a), Technic Connector Toggle Joint Toothed Axle and Pin (4273), Old steering arm (4261), T-End connector (3651) .. etc etc.
You know, technic parts from the 80s.