People who park in a huge space between other cars, but slap bang in the middle so there is not enough room for another car either in front, or behind but an annoying amount of wasted space either side. Just move forward or back a bit, you selfish twat.
People who wash up all wrong. Water not hot enough, they don't change the water halfway through so towards the end it's like a soupy gruel with floating bits, people who don't wash up in the right order so the glasses and cutlery get all greasy and smeary at the end.
People who swill coffee and tea cups under a luke warm tap and think they are washed. They are not. My MIL does this and all her cups have horrible stains in them as a result.
People who don't use washing up bowls. unless you have a double sink, where do you throw all the slops?
People who hang washing out wrong so it doesn't dry evenly and gets all screwed up.
People who rinse everything so bloody thoroughly before they put it in the dishwasher that you wonder why they bother with a dishwasher at all.
On the flip side, people who think the dishwasher is some sort of magical waste disposal unit.
People DH who think they are being marvellous by remembering to hang up their wet towel but lay it over the top of another wet towel.
1 wet towel placed over another wet towel = 2 wet towels.
1 wet towel placed over one dry towel = 2 wet towels.
1 wet towel over nothing but the banister or towel rail = 1 dry towel.
It's really not that difficult.