Personally, I don't mind any of the three trends the OP mentioned, as long as they're tasteful-- That's the main priority for me.
I actually like the flowered stuff... As long as it's dainty and of good quality. Small or small-ish, "real" (In quality/appearance) flowers for accents? I like that. Big obnoxious pink poofy things that are supposed to look like flowers, but are obviously low-quality and cheap? Not so much.
Tastefully-placed gems on accessories? That's pretty. Barrettes covered in fake plastic gems? Nah.
And some interesting feather accents, I think that can look really wild and cool. Random hodgepodge of feather clumps everywhere? Not quite...
Honestly? To me, pretty much anything can be acceptable-- it's the tact behind it that matters.
However, what DOES annoy me is when things are, very obviously, low-quality and cheap... Can that can be considered a "trend"? I certainly do see it a lot. (I'll exclude ponytail holders and pins and the like from this-- I'm referring to actual accessories here.)
It's like, if you're going to sell it, why not make it look good? If you're going to buy/wear it, why not take the time to get something that will hold up and looks nice? It's all in the eye of the beholder, I guess. Obviously it sells if they still make it.
As for the hair toy thing, I tend to call them "Hair Toys" when referring to a collective bunch of stuff, otherwise I call them what they are. (A fork, a stick, a flexi-8, etc.) It doesn't really bother me, though.
Oh, gosh! I stumbled across a banana clip while cleaning a while ago. Is it bad I couldn't even figure out how to use it? :P Probably for the best, given these posts!
And, yes (Almost done! ), I'll agree with what someone said a few posts back! I hate seeing those gorgeous, shiny, flowy locks in commercials. Baww, I want that! Too bad it's not possible with my hair!