I know Agape scissors pose are used a lot often in my eyes, along with some items that are mint and cream (I know I use the sleeves from Daughter of Snows, but a lot of times I wished the cream part was a blue like Lady Evangeline or a pure white like the rest of the sleeves.) There are others that are used way too often, but I can't seem to remember them all right now.
Oisins are way overused. But I still love mine.
Bremen and Keiko seem to be in every cutesy avi ever made.
All the cream, ever.
Navy/colbat and cream
And all the Ciel/Rosamund stuff
IRL one of my favorite colors is "Rosamund Red" but I call it raspberry red instead so people know what I'm talking about.
I managed to buy a purse with all of the following colors on it: Keiko blue, colbat blue, cream, white, rosamund red, and a generic cutesy pink. It's like all of the gaia color trends combined.
I'm seeing Devoted Spica fairly often on blue-themed avatars these days. Especially the boots. Oh, and Sainte Ciel-Agape. I mean, an item that modifies nearly all recent items? Who can say no to that? I'd honestly be more surprised if it was NOT used so often.
The only item im kind of tired of seeing is the "fell in the vat of grease" pose from Lusty. I don think agape is over used, since you dont really SEE it (just the effects) I rarely ever see anyone use anything other then the scissors from it. The scissors just make other items more versatile.
this. Luckly nowadays people are going for more cutsie than sexy avatars.
Also in the past it was pengu and seal slippers with winged anklets. I'm not gunna lie I did that for years until I found the slippers to bulky.
Mostly cream items, but I myself have fallen into this category many times.
Other than that, I can't think of one specific item that I think is overly abused.
For a time there, the Marionettes (be they original or a recolor) got on my nerves.