How do you define "Faddish?"

This is a definition by exception. It's not what it is, it's what it is not.

It's not "classic" or "traditional."

Although a "High & Tight" is extreme, it's traditional, therefore not faddish.

Skinny Jeans & Bell bottoms (excluding Naval uniform traditions) however would be considered faddish.

Part of this is evolution of words. Words change meaning over time, so what seems like a vague word today may have been a very specific word when it was first introduced into the regulations long ago.

One word: Hipsters.

AR 670-1 gives leaders a lot (maybe too much) flexibility to enforce uniform and appearance standards. A squad leader can explain to his/her squad what he/she deems faddish, which should be nested with what the PSG deems faddish, which is nested with what the 1SG deems faddish, etc. etc. The commander is overall responsible for the discipline and good order of the unit but, NCOs enforce the standard (sometimes above what the commander deems acceptable).

anything that draws undue attention to the member or detracts from a professional appearance

I would say that this offers each command the chance to decide for themselves what is appropriate, it is in essence practicing mission command.

I would hope that we can move away from high and tights, they are faddish in my opinion. We are supposed to be a professional representation of the American people. Shouldn't we blend in a little?

I am not a commander. Most the time is say "the commands deem faddish".

I agree this word is Ambiguous in nature. Is it based on one's idea of fadddish. I say on thing is a fad while others would argue the opposite.

To me....does it look and maintain a professional look? If not, it's faddish!!

It's unlike the Army to leave anything vague, so it's a little perturbing to us when they do, however, I think it's a good place to have a little grey. It's good to have the opportunity to exercise our minds, and use some common sense every now and then. I have used a variation of the haircut you see in my profile photo ever since I graduated OSUT and have been allowed to have hair. I recently decided to check online and see if I could find a hairstyle I thought might fit me better. Looking on some style website at hair parts, lo and behold I find out it's in style this year to part the hair on the side, but then shave the one side all the way up to the part. I think this is an example of such "faddish" hairstyles.

http://www.menshairstyletrends.com/wp-content/uploads/2014/07/Shaved-part-ill_hana1.jpg?7ccf3d

A successful merchandise campaign.