My vote for two of the best:
Miniskirts and Thongs.
My vote for the worst:
The unbelievably unattractive "style" of women shaving off their beautiful natural eyebrows and then penciling them back on, thin as the edge of a dime. I guess this works okay for a small handful of women, but I generally find it ugly, bordering on self-abuse. Seems to have popular in the 20's and 30's, though.
Usually, they didn't shave them off... they pulled them out. They even had special equipment for it (not like today's, uhm, waxing practices. And they don't pencil a landingstrip on, not even a thin-as-a-dime one).
As far as I know it went on rather generally until far in the fifties and even sixties.
(Pulling out eybrows, I mean.)
Yes, I agree with your judgement: I seldom find/found it attractive.