Lying about age to put them in the age bracket for younger women and wide- eyedly pretending this is some kind of glitch.
A bitter, cliched list of things they dislike about women, usually including: 'fakeness', fillers, not responding to their messages quickly enough, 'drama', interest in popular culture, hair extensions etc as though they have a unique insight into what makes women inferior to them, but some lucky specimens might make the cut.
Not writing anything except 'just ask to find out more'. Why should I be the one to make the effort here if you can't be bothered?? I would prefer them to write nothing just fill in the details and have some clear pics.
I avoid those with very sporty pics, simply because I don't really like sport. Nothing wrong with this generally and it shows who might not be my type.
Unpleasant comments such as 'none of your business' in the employer section. Just leave it blank or very general such as 'law firm', civil service, NHS or whatever.
I don't like seeing identifiable pictures of children in profiles but I also think people should say if they do have kids. No further details needed than that.