Objectively speaking, what traits does the perfect mate (for everyone/anyone male or female) have?
I mean that pretty much anyone would be the happiest they could be with a partner as they are with this person.
It varies to a degree. There's dimorphic traits(masculine/feminine) and aesthetics(attractiveness).
For males: A strong defined jawline, masculine chin, strong brow ridge, high cheek bones, hunter eyes, a large high test skull, tall, wide shoulders, thick wrists, wide chest, etc. These traits are generally considered universally attractive in males.
For both genders: symmetry, no deformities.
>mental personality traits
Personality is really just an extension of looks.
Highly aesthetic males who don't have highly dimorphic(masculine) traits are considered "prettyboys" "twinks". Think Zayn Malik from One Direction.
That's why I said it varies somewhat.
pic related and zaynn malik are masculine.
someone who isn't masculine but "pretty" would be troye sivan.
Yes, aesthetic "pretty" males who aren't masculine at all aren't attractive to the vast majority of females and usually look androgynous.
Straight females in general want a man who's has at least a certain degree of dimorphism, not a man who looks like a girl or an underage boy. There are exceptions, of course, but they're rare.