I had an absolute sulking prick of a boyfriend- one of the reasons I actually ended up finally dumping him as the day prior to the dumping he had spent 15 hours solid playing computer games and deliberately ignoring me. Most of his life was spent smoking weed and playing computer games, and sulking. His sulks could last at least 3 weeks. He ruined most moments of my existence with him.
A memorable sulk was when we were driving somewhere (he was driving) and I disagreed that a particular unremarkable hill with a road going through it was beautiful and he called me an 'uneducated troglodyte' and then abandoned me at the next service station, driving off and left me there for the best part of an hour before coming back to get me.
He also refused to come on holidays with me, refused to pay for himself to come (he earned significantly more than me) and then sulked when I went. I know he read my diary when I was away and he didn't like what he read, so he punished me by sulking when I got back.
He barged into a commuter on the tube deliberately and refused to apologise to the commuter, I whispered an apology on his behalf and then he threw an epic tantrum on the tube and refused to speak to me for the next week or so.
He would lie on the sofa, facing away from me and stretched out, with a hood or towel over his head so his vision didn't have to be sullied by looking at me, for hours and hours at a time.
On holiday somewhere hot and beautiful, he had a tantrum and had the only room key so went back to the hotel room to sulk, fully expecting me to follow. I went to the reception, got a spare key, went back to the room, got my passport (just in case) and went back out to the sunshine leaving him to sulk in a cold dark room.
We had tickets to a (boring) military event that I didn't want to go to and suggested he just go with him mum, but he wanted me to put on a fake smile and pretend the relationship was fine . His mum had got free tickets and passed them on, he didn't have to arrange transport or anything to do with logistics, just turn up and meet his mum. He forced me to go, and when I didn't enjoy it (it was just hours of tedious shouting to me) he screamed about how ungrateful I was and 'all the effort' he had gone to get the tickets. A total sum of zero effort.
We were engaged and I looked into my future and saw it would be miserable, and downtrodden, and thought fuck that, and dumped him, finally. He said he would like to 'fuck me in the eye' and did not take it well. I fully understand why his previous girlfriend had done a moonlight flit and vanished one day when he left the house.