Ohhh, I have so very many!! See, my mom was lazy as could be, but she taught us girls how to clean well when she did clean, at least. Because of the fact that my mother was so lazy, I am very much more inclined to clean...
But my fiance's family!!! Oh goodness! We currently live with them and, while I absolutely love them, they are all such slobs! There is never an empty space on any table as it's cluttered with various papers, soda cans, coffee cups, pens, random collectibles and plants, etc... The dishes pile up all over the counters to the point where there is no space open on the counters for anything(couldn't even find a spot to make a pb&j sandwich earlier, I had to clear one first) and nobody does the dishes by hand! If the dishwasher is going, they won't continue doing dishes and then they will leave it full until it gets emptied by everyone using everything in it. I can't tell you how many times I've done ALL of the dishes and cleaned up the kitchen, cleared the fridge of bad/expired food, etc. just for it to go right back overnight!
My BIGGEST pet peeves, however, would be...
1.) When someone uses my towel. I don't care if you just got out of the shower, that's nasty!!
2.) When my lovely fiance leaves stacks of cans around his desk. Drives me crazy!!
3.) When clothes get thrown on the floor RIGHT in front of the hamper and left there.
4.) When the floors are so gross that stuff sticks to your feet when you walk. Seriously? Sweep up your messes! I'm tired of stepping on sugar every time I walk past the part of the counter where the coffee pot is!
I'm certainly not going to complain about it, especially not to them, because this is their house and they can do as they please, but I CAN complain about my fiance's messy habits!
I have some of my own, I admit. I have a tendency of accumulating cups around my nightstand because my lips and mouth are always dry when I wake up several times throughout the night. They're always plastic, though, so I just throw them in a bag to get thrown out. I also have a tendency to leave my sketchpads and pencils in a little disorganized pile next to my side of the bed. :/ I need to work on those. lol