What is your biggest pet peeve?

These days, it's bad grammar.
Especially in emails.

People can't tell there ass from a whole in the ground when it comes to grammar, and send that crappola out on professional-ish email.
Neither management nor rank-and-file should except the bad affects of poor grammar.
Irregardless of how common-place it has become.
Their going to either have to learn to communicate properly in the english language or there going to appear, for all intensive purposes, as idiots.

My biggest problem is with the regulation itself. I have sat on a few boards and listened to other senior NCO's ask about the ACU and soldiers give answers from 670-1 and those soldiers are told they are correct.  Like someone posted earlier, the AR does not cover current uniforms. The other problem I have is when higher "brass" talks about the lack of standards and discipline soldiers have today when the regulations that provide these standards are out dated and there is no rush to get them approved.

One more thing that bothers me isn't so much a violation, it's an attitude. There are plenty of officers who don't have the faintest idea how to put together their dress uniform. Some just don't bother to look up the rules, some don't care enough to double check, some are just plain clueless, but to me the worst offenders are those who think the answer is it's "NCO business" or I'll just ask top. Wrong answer. It's one of those things every Soldier needs to know and has in common, and not just because we want to look sharp.

I used to not understand the inclusion of the DA photo in boards. But there is a reason beyond the stated ones- the uniform is one of the very few things all MOSs and ranks have in common. It's a basic standard that can be used across the board to gauge attention to detail (knowing and applying a standard), your attitude towards the Army (caring enough to look up the standard), and your ability to figure things out- I mean we all wear the same uniform, so you can just ASK anyone, literally anyone, if you don't know. If you can't do that, well, it shows up to the rest of us in the form of a visible uniform violation.

NCO's and Officers that can't put their dress uniforms and/or awards together correctly. That makes me want to punch a baby...

My biggest pet peeve doesn't have to do with uniforms, but its when an individual thinks they know something about everything and always has a one up story. I don't know if its the need for attention, but it drives me nuts if you are telling someone a story and someone else jumps in and has to tell us something they did that was way better then what you just did.

Regarding the military? I'd saying it's a jacked up uniform. I've seen name tapes reversed, flags upside down, patches and other velcro items not placed on correctly (crooked), heavily worn velcro items especially the flag. Show some pride in the uniform.

My biggest pet peeve are policy letters that go against AR 670-1, making it impossible to make on-the-spot corrections. 

When a subordinate makes a uniform correction on a higher ranking individual, and violates numerous regulations in doing so (ie, when an enlisted Soldier makes a correction on an NCO, but doesn't stand at parade rest in doing so; when an enlisted Soldier or NCO makes a correction on an officer, but doesn't salute when approaching or stand at attention while doing so).

When uniforms have design components that the Army seems psychotically opposed to allowing us to use (hoods on jackets, pockets in trousers, ear flaps on winter patrol caps, etc, etc). If the Army didn't want us to use such design components, the Army should not have procured items that include these design components.

When Servicemembers assume that a fellow Servicemember is intentionally flouting or ignoring or not adhering to regulations, instead of having a professional conversation to ascertain if there is a legitimate, authorized reason for the issue noticed....why must we assume that Servicemembers are doing the wrong thing, why can't we assume that Servicemembers are doing the right thing? Shaving profiles, for example; I routinely have a shaving profile, and throughout my career, it seems that most Soldiers, NCOs, and officers just cannot resist assuming that I'm all jacked up because I haven't shaved for a day or a week or a month or whatever, and feel that it is their duty to inform me that I must be clean shaven when on duty (really, no shit, we're supposed to shave while on duty?). Clearly, if I'm in a full, trimmed beard or haven't shaved in a week or so, and in uniform, its authorized--what compels someone to make the assumption that I'm all jacked up, and why do they get so mad when I tell them, professionally, that it is none of their business (we do have a law, HIPAA, http://www.hhs.gov/ocr/privacy/, protecting such information, after all)?

When former Infantry officers or Soldiers refuse to remove the button from their ASU from which their Infantry blue cord used to hang.

When those who have been in the military for a long time refuse to buy new uniforms, and continue to wear uniforms that don't fit because the Servicemember has gained substantial weight.

When Servicemembers make uniform corrections based not on regulations or legitimately established command policy but on their personal preference or the established personal preference of someone other than the unit commander. IE, when Servicemembers make uniform corrections based on standards they make up on their own or based on what they think the actual standard really is.

When we're issued uniform items, required to deploy with them and carry them around, but we're not allowed to wear or use them (things like the black parka in Iraq circa 2004-2005, for example).

Hands in pockets? You mean Air Force Gloves? Just kidding. LOL. Seriously though...mine is open cargo pockets, especially when they are empty.

People blaming their own failing on something the military did, or did not do to them. It was not the military's fault that you started using drugs, ETC.