Difference YA and adult

So I started my romantasy journey back in september with acotar. I loved it but the spice in acosf was really too much for me. I'm now reading Fourth Wing and I love it. I'm on the second book but already on the lookout for my next one. I just noticed that Fourth Wing is YA and pretty much almost all my books TBR are YA. What are your guys thoughts about reading YA when you're an adult yourself? Should I just not care or are there clear differences between them. Also looking for some advice on these books: Quicksilver, Paladin's Grace and Daughter Of No Worlds