For me, a lot of tropes depend on how they're played. For example, I understand having a secret life away from your immediate family if there was an immediate danger of the family being kidnapped by MC's enemies. I can understand that. But what I don't understand is when the MC hides their secret from their parent or romantic partner, when said person could actually be a viable character in the story. People have mentioned Twilight, but I have to say, what if Charlie knew about the paranormal happenings in his town and actually got to play a real role in the story?
But in terms of something annoying that I would try to avoid, I would simply say to try and avoid putting your romance into a YA setting. I know YA is popular, but I've been watching some stuff that was based off YA romance books lately, and as a grown-up; it's all cringey. There a handful of circumstances where having a teenager get married makes sense. But I'm really tired of stories where 99% of the FMC's role in the story is to bear a child. If she's not X, she's a breeder. If she's not Y, she's a breeder. You get the point. I just think it's tired and I think it's extra cringy when a 16-17 year old is put into a situation where marriage and parenthood are their ONLY options. If they want to become parents, at least let them be adults first.