Eggbeaters: blew a spring on one set, and a bearing on a second.
Time ATAC: heavy; slop in the retention allowed the shoe to lift a millimeter or so off of the pedal when fully clipped-in; knees hated the re-centering float.

Now riding VP One Bebop pedals:





Like SpeedPlay pedals, but without the bulky road-shoe-only cleat.