"Hate" is an awfully strong word, but there are a couple of items that I could never see myself wearing:

1) Any bonnet w. a "toorie" (not that I'm much of a hat person anyway)

2) Lace jabot and cuffs (I'm with chasem 100% on this one)

... just not my style.

Sporrans are great as long as they're large enough to be functional.

I do like the look of a good fur dress (or full mask) sporran, as much as I have moral qualms about them. (Full disclosure: I do own a beautiful muskrat fur dress sporran that I bought several years ago, but I do have mixed feelings when I wear it.)

Oh yeah... one other thing: Overly ornate kilt belt buckles. They're fine when they're appropriate to the level of dress, but for everyday I say the simpler the better.