-When people want "just a sip" of my drink. If we were in the desert and you were about to die, I'd gladly share. Otherwise, get your own. This is my biggest pet peeve with my wife. We'll be at a restaurant, fast food joint, or similar business, and she'll say, "it's okay, I'll just have some of yours." I don't like drinking others' backwash. This made me freak the fuck out as a child.
-Grammar and spelling nazis. Yes, it bothers me to no end when I see people confuse "your" with "you're," however, it's annoying when someone makes such a fuss that it distracts from the topic of discussion. Given the conversational nature of internet forums and social media sites, such mistakes are bound to occur. It's less forgivable on forums, however. I think it bothers me the most when I read company memos and emails and see glaringly obvious mistakes. I don't expect everyone to possess perfect spelling and grammar skills (I certainly don't), but surely they've heard of spell check.
-When people don't fact check on facebook, reddit, forums, etc; when people post any article and assume it's legitimate even though anyone can publish an article online. Check the article's sources, at least. If they don't list sources, assume the article may be bullshit or poorly researched. Don't share it with your friends as fact.
-Imperial/Standard measurements. The OP said it better, I won't repeat it. There is something very appealing about the metric system. Everything converts easily. Why is the US still using a dated and confusing system? It's like a big fuck you to the rest of the world. I'm an inventory buyer and we have buy metric and "standard" hardware, which means our production team has to make 2 versions of many of our kits (1 for international, 1 for domestic). It's inefficient and costly. It makes no logical sense. I understand it would take time for the US and any countries using the old system to convert to metric, but it would be beneficial in the long run.
-Small talk. Enough said. I don't care what your dog did to your curtains. I don't want to talk about what I did last weekend.
-Road rage. You sped up and weaved through traffic to get around me because I accidentally cut you off. Oh look, we've stopped at the same traffic light. So you didn't make it to your destination any sooner and you've consumed more of your gas and endangered other drivers by trying to pretend you're racing the Indianapolis.
-When people hover in my cube or stand behind me while I'm trying to work.
-When (I assume) I'm displaying my "normal" face and people ask if I'm upset or angry. "Nope, just thinking." Worse, when they continue to push the issue it as if they didn't believe me, which does lead to me becoming upset or angry because my thoughts have been distracted and I've had to expend energy persuading them that, no, nothing is wrong. Even worse is if they then say, "see! you are upset about something!" Then I explain why I'm upset which inevitably hurts their feelings and makes me look like an asshole.
-When people try to micromanage my time and work.
-semi-related to the above: When I have a particular way of doing a task or solving a problem, yet people question it and insist I do it their way (usually bosses and my dad). Then, if I make mistakes or take longer, they wonder what went wrong. "Didn't ya do it like I said?!?" "Yes I did, and if you'd let me do it the way I'd been doing it, I wouldn't have made this mistake." "But that's not tha way y're supposed to do it!" "Yes, but it works."
-Alpha males who feel a need to display their alpha traits with every chance they have.
-When people select a tiny quote or statement from a larger speech, body of writing, etc by another person and take it out of context to prove a point which could easily be countered had they understood or read the entire speech/book/article/etc. This is an increasingly common occurrence in the age of sound byte driven media.
-When people ask, "whatcha thinking about?"
Yes, I realize that everything I just typed is
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