I don't like romance genre animes that have them get together at the very end. Too often I see that people seem to prefer the chase rather than the relationship itself, which will not always be perfect and picture-ready all the time which is why they tend to do that. Ore Monogatari is one of the only 10/10 animes I've watched because of this, the problems they faced didn't make me want to rip my hair out and skip to the end, it made me want to watch it.
I also don't like how girls are always beautiful and the guys are ok looking, or on the flip side the girls look alright while the boys look all special and made up. It's REALLY WEIRD how they don't just put equal effort on both sides, especially considering how the best anime have an equal front on character design. I guess it goes to show the difference between wanting money and genuinely wanting to make a good story.