Going a little against the post but I've met all of your examples in real life numerous times (l tick a few boxes) except for the chicken.
Food
People who seem to never over eat eg never buying more than you 'need' when ordering a takeaway or inviting someone for a meal and serving say just 4 small roast potatoes. When eating out or takeaway I generally have a bit more than I need.
Hygiene
Changing PJ every day. Never missing a shower when you're just relaxing round the house.
Invites
Getting affronted because you weren't invited
Getting angry because someone declined or scared to say you're not coming
Texts/WhatsApp/FB
Being enraged that you recieved a text late/early
Expecting immediate replies (because you know they're posting elsewhere)
Being upset that your post wasn't liked/was ignored
Expecting constant contact with partners who are out without you
Blocking someone for minor 'offences'
There seems to be a disproportionate amount of narcissists partners/family/friend in MN world....and I'd never heard of poo trolls either till MN.
And finally...
Not using your words....some sort of dilemma/annoyance/grievance, but not saying anything to your collegue, partner, OH, MIL, best friend, customer etc...though maybe this is happening everywhere but because no ones saying anything I don't realise!