For the worst list,
I can't think of many as bad as the Shimano Biopace chainrings.... but this is only from my own knee-wrecking experience with them.
Did anybody out there like them? Maybe I missed something!
Also, how about the extra brake levers running horizontal to the bars- the convenient ones designed to keep hands on the bars at all times. I "loved" the feeling of gliding along at speed with those suckers clamped all the way shut! Never had any on MY bikes......
Jim "Viking Caretaker" Wittstruck
Lakeville, MN