I find it annoying when Sims constantly play video games on the computer, so much so that I very rarely give even the richest Sims computers. Also, when a Sim tries to collect laundry from around the house and drops it all in a big smelly pile for me to find later, while they go and play in the sprinklers/on the computer.
Oh, and the most annoying thing? When it takes hours for my younger Sims to change (like if they need a shower before school, or change out of PJ's), then they get scolded for being late to school and automatically grounded! Then sometimes, I try to make them go to school-it's around 11am by now-and it says 'I don't think so! You're grounded!' or something to that effect. Being late for work is almost as annoying.
As for memories, I wont even go there...