Perhaps a slightly non-normative answer...As a bi/pan person, I think my interest boils down to curious people. If you are genuinely curious about the world and other people, I am probably going to find some level of attraction to you (be it friendly, romantic, or sexual). Curiosity is a necessity for empathy and kindness, so it's usually a great indicator. Plus if you're curious about everything you will probably take the time to get to know me (or whomever); it means you probably care about others at some level. Surely you could argue for exceptions to this, just like how other qualities of attraction could easily be spoiled by another poor characteristic.
Most other things are secondary to me. For example some people say that confidence is key to attraction...well oftentimes a struggle between humility and lack of confidence can be equally as attractive (to me). If you're not a confident person but have a deep quiet curiosity for a broad collection of topics, that's still pretty attractive to me!
On a more physical level, I find general qualities of health attractive (pretty basic I know). Tall and strong people are hot, as are small and healthily lean people. People with a little more weight, but therein inherently strong, are attractive. Tough hairy skin or soft/smooth/gentle skin, on either masculine or feminine people, are both sexy in their own ways. A developed chest (boobs, pecs, or both) is sexy to me. Gender bending peeps are also super attractive to me, nonbinary and nonconforming alike. Blends of personality, presentations, and physical features are just chef's kiss, and people who know themselves and are unapologetically authentic about it are just lovely. People who take care of their hair (including those who are bald) are hot. Piercings and tattoos (when tastefully executed) are super hot. I could go on but I think that gives a good depiction of my tastes. :)
Currently Sleep Token - Euclid, if not the entire Take Me Back To Eden album