Soooooooooo many things, it makes me wonder why I stick with him. 😆 #joking (half joking!)
Over 30 years together and familiarity breeds contempt! 😂
He records and watches every pre 1950s (usually black and white) film on Talking pictures, that was out some years before he was born, so it's not for sentimental reasons. 80% of them are SHIT.
Like with you @Worriedsickmostofthetime he puts a film on the TV, sometimes 'for background noise' even if he has seen it 15 times in the past 5 years. (He is obsessed with watching TV!)
Flicks his slipper up in the air (when he's sitting down with his legs crossed.)
Eats things with a knife and fork that should be eaten with your hand/fingers (like cake, garlic bread, naan bread etc.)
Gives a running commentary of what he is watching. (I am on the laptop or reading a book, but he keeps telling me what's happening on what HE is watching.) After a while I tell him to shut up!
Sits on his computer and (again) gives me a running commentary of what he is looking at. Again I tell him to STFU. I don't fucking care and I am doing something/looking at something myself!
Often sits there (at his computer) going 'hmmmmm, well.... gosh........' like he wants me to react and say 'wow what is it, please tell me!' 
Repeats the same lines/phrases over and over, that he has said last week, last month, last year. EG, when we're in the car, he swerves to avoid potholes and he says 'I feel like a bad driver doing this!' every fucking time. He must have said it 20 times in the past 6 months. I just say 'yeah I know you feel like a bad driver, you have said it dozens of times before!'
Then when we go into a local charity shop that has a picture of a buddah behind the counter (not for sale, the manager owns it,) he says 'oooh look, me!' Every. Fucking. TIME. He must have said it 100 times. I'm just like >>>🙄
Oh and as another poster said, sometimes he sneaks up on me when I'm in the kitchen or garden. He just appears out of nowhere, and is like 4-5 feet away from me, just looking at me. Freaks me out! I said to him the other day 'I'm going to put a fucking bell round your neck!'
I even close the kitchen door behind me now, so he can't just randomly appear behind me like a ghost! 👻
I'm easily annoyed. 😂 mostly by him!