Guy here...
In a nutshell at this age, something simple.
Sounds weird but it's true. Things that complicate people (men and women) are often more decisive than the regular good stuff. Anyone can be good looking, smart, rich, busty/endowed, charming, funny... and if you're not, easily compensate for those bits you're not.
I'm finding the older I get (I'm married, but it applies to life in general), I just want something hassle-free!
I might sound like a dick saying this, but hear me out... complications many people have are: kids, health issues, personality 'quirks', debts, parents that are too close/influential/reliant on you, incompatible smoking/drinking/food habits etc etc
I can look at any of the women in my social circle and say yep, they're financially secure, attractive, interesting, funny... (no particular order)... they ALL tick those boxes. What makes or breaks it, i.e. what we look FOR, are the things that make that woman difficult.
And before all the ladies in here say that makes me shallow or a monster etc, MN is plastered in 'red flags'... the man is too controlling, too sexually demanding, too lazy... these are your red flags... these men you're on about are probably also likewise good looking, charming, funny, financially secure etc... but these NEGATIVES are what you judge him on, and what you dump/divorce on.
In short, be a nice, EASY (not sexually, just uncomplicated) woman and you'll be attractive (to the majority).
It's all statistics... if you're a vegan for example, and you insist he is too, you've probably divided your pool by say 25 already. Most men (statistically) are not vegan, and while it can be worked around, most men will not be looking for one... if he is checking out two women and they're near identical, do you think he's going to go for the one he can continue his (statistically) polyphagous lifestyle with, or the one he has to give up, meat, cheese, eggs etc for?...