I first heard the expression "socks on the floor syndrome" from esqmommy
It's the annoying thing(s) that a significant person does that irritate one a lot!
(I, of course, am nearly perfect! :?)
For example, my DH folds his clothes neatly and puts them at the FOOT of the bed - so I trip over them when I make the bed.
(We won't discuss what I do with MY clothes)
One of the other things he does that I REALLY hate - he smokes a cigarette right before coming to bed. Now, there's a turn-off.