I was just writing about my horribly outdated, square toe boots on another thread. Yes, they are dated but I'm keeping them for practical purposes.
Ruffles: I developed a poison eye for them over a year ago. But I have held on to them, thinking I just needed a rest.
Long cardigans: my eye has become poisoned to these lately. I don't know what it is, or why, but every time I reach for one of these, I wind up taking it off again and choosing a shorter one.
Silver: sigh. I've slowly adjusted to gold instead. Silver just doesn't look right, right now.
Jewelry, in particular, statement necklaces: what looks right to my eye now is much more minimal. I am often leaving the house without any jewelry whatsoever. The only bling might be the hardware on my bag, and the gold buttons on my cardigan.
Otherwise, to me, it's less about any individual item, and more about overall effect. A few years ago fashions boldly combined lots of pattern, colors, textures, all in one outfit. I'd wear a paisley top with a bright cardigan with contrasting pop of color in the bag and different color for the shoes, textured hose, velvet and snake and leather... LOTS going on in one outfit! The more the better!
That looks dated to me now -- it seems more fresh & modern to have an understated outfit, with neutral colors for core pieces, and coordinating colors for bag and shoes.
For those of you who mentioned short tops, to my eye, it seems tops are getting shorter, not longer. Yet looser, to skim rather than cling.