It's funny because I see people treat it as this super rigid system with strict rules, but when you actually read across a ton of omegaverse, the 'unique traits' are basically whatever the author needs them to be for the drama. Like, the core idea of alpha/omega/beta dynamics with heats, ruts, scenting, and bonding is there, but the biological details shift wildly. Is a bond permanent and unbreakable, or can it be rejected with immense willpower? Does the biology force submission, or is it just an overwhelming urge that characters can fight against? That variation is the real defining trait for me – it's a sandbox.
Some stories get really into the speculative biology, almost like sci-fi, detailing gland functions and pheromone chemistry. Others treat it more as a magical or spiritual fated-mate system with biological window dressing. I lean towards the latter kind of stories, honestly. When it gets too clinical, it loses the emotional punch for me. The most interesting use of the biology isn't in the heats themselves, but in how societies are built around it – the oppression, the elite alpha politics, the way omegas are either coddled or commodified. That social worldbuilding, enabled by the biology, is what generates the unique plots, not the slick explanation of knotting anatomy.
My pet peeve is when the 'unique trait' is just making the omega extra special – like, the only one who can soothe the most powerful alpha's rage, or an omega with alpha strength. At that point, you're just using the aesthetic to tell a Chosen One story, which is fine, but it's not really exploring what makes the dynamic tick. The best ones force characters to navigate the limitations and cruelties of their biology, not just bypass them because they're the main character.