VoyageOfDad I think another thing is that once you get to 'a certain' age you start to get a bit entrenched in your habits and less willing to compromise.
Yes, I'm no longer willing to do all the housework and let the man make every decision, as well as generally being expected to accommodate everything he says and does whilst having no personality of my own. How uncompromising of me! 
Bellasima - I've always had a tendency to go for older men due to the apparent immaturity of my male peers (well, the single ones - the others get snapped up!
), and it hasnt really helped. If anything they are more objectifying too (not looking at women their own age). And still immature, though hiding it better.
Beyond - I'm intrigued by your comment: i used to know a woman who (in her late thirties) wouldnt date a man if he
- had children
- was divorced
- had been in the army
- still lived with his parents
Yet then wondered why all the men she dated didnt turn out to be keepers.
Ok... 1) Children. Not a deal breaker but definitely not if it meant we couldn't afford to have our own children. Is that so weird?
2) Divorced - Potentially someone who takes marriage lightly, or can't settle, or who is secretly abusive or something. All depends on case by case though!
3) Army - I just can't see myself getting on with someone who'd voluntarily signed up to the military, our beleifs and values would just be too different.
4) Still lived with his parents. Seriously? Someone who, barring looking after a disabled parent, or being disabled themsleves, had never left home? I just couldn't cope with the lack of ambition and being under the parent's influence. Not to mention not knowing how to run a household, cook, clean, manage bills etc (and late 30's living with parents - how have they not saved up enough to buy a property yet?!) I left home at 18 so maybe feel more strongly about this than usual... if they are London based with ludicrous house prices I'd feel slightly less repulsed.
Feel weird now. Are my standards too high? But then I'm not online dating or anything where I screen men out like this, so it's possible I could meet someone in the above catergories!
IfNotNow I have dated a Tory ffs
Oh now come on! We must keep some standards! 
The thing I have realised though is that the short, bald, shy, needy, boring of jobbed are just as bad as the good looking ones in the end. And can often be real woman haters actually ... So, really, if I'm going to date a twat, he may as well have all his own teeth.
Your posts seem spot on and are making me giggle! Perhaps it is our deranged sense of reality humour that is keeping them at bay, eh? 
TBH I'm in a shitty life position so I can see I get catergorised in a certain way and unwanted by men. My OP was more of a general observation about single men vs single women my age and older.