Kind of a loaded q there. Since women, like men, are so varied in tastes, there are diff flags. Most common are things like how does he treat u ie respect, consideration, compassion. Being lied to - about anything. Being treated diff/badly in public. Ofc some women want to see how it goes b4 they decide Anything. I hope this helps. W/o being nosy, is there a specific reason yr asking?
No Job, if you don't live on your own, if you do live on your own and your place is filthy,if you play video games constantly, if your a gambler, if you smoke, if you have to have a drink(s) every time you go out, if you ask to borrow money or forget your wallet, if you are controlling, if your a player... or... you could be close to perfect but if you don't cut your Toenails that's a definite "see ya"! lol
Scary behavior or excess spending. Drinking heavily or using drugs. Checks out other women or comments on them. Mommy's boy. Can't cook or doesn't clean. Objectifies women. Any level of lying. Talks to ex's. Doesn't attempt to meet 1/2 way.... no hun, there are so many "red flags" even porn can be one too. The flags are dependent on the woman & previous experiences or witnessed experiences.