Some habits may seem innocent when you first meet a man, but as you get to know him, these tell-tale habits can expose his true personality.
Disrespect

If you want to know how a man treats others, watch how he treats his server, cashier, or the person cleaning the tables. Does he whistle for a waiter? Yell at the retail employee? Forget his manners and refuse to say “please” and “thank you”? He has no empathy. He only treats others with respect when they can do something for him.
Blame

When something goes wrong in his life, something is always someone else’s fault: his ex-girlfriend, his boss, his friends, or merely bad luck. He will stretch stories, make countless excuses, and play the victim card rather than utter an apology. He can’t admit when he’s wrong, which means he will never learn how to be a better person.
Flaking

His word means nothing because he backs out on plans all the time. He shows up extremely late without any regard, or cancels at the last minute. Flaking like this all the time shows that he does not respect others’ time and energy.
Cruelty

The way a man acts toward helpless animals says everything about his heart. If he beats a stray dog, mocks a suffering creature, or abuses his own pets, he is heartlessly cruel. Any good man would do his best to nurture and defend those who cannot defend themselves.
Manipulation

Instead of communicating with others like a mature adult, he uses guilt trips, gaslighting, and the silent treatment to manipulate others into doing what he wants. He’ll guilt you into believing you’re wrong for having feelings or contort your words so that you’re always apologizing to him. He does this because he sees relationships as games to be won.
Aggression

He can’t take two seconds of constructive criticism, joking around, or someone disagreeing with him without losing his temper or becoming heavily offended.
His ego must be so weak that he feels the need to yell, get angry, or try to intimidate others into shutting up when someone opposes him. He obviously has no control over his emotions or his temper.
Selfishness

Be it money, favors, emotional support, or putting effort into a relationship, he’s going to want everything given to him and offer nothing in return. He’ll happily have others pay for his meals/drinks, drive him places, and listen to him talk for hours, but vanish when someone else is in need of assistance. He’s a selfish parasite.
Gossip

He constantly criticizes others, belittles their accomplishments, or badmouths his friends to make himself feel better. Rather than lift himself up, he tries to tear everyone around him down. This behavior is a huge red flag and shows his insecurity.
Lying

Big lies are obvious dealbreakers. But a pattern of telling unnecessary lies about small, irrelevant things is too. He lies about where he was, who he spoke to, or what he was doing. Typically, he does it to make himself look good or avoid a small inconvenience. It’s impossible to trust him at all because of how dishonest he is.
Intrusion

When people tell him no or ask him for space, he takes it as a challenge. He will keep bothering them until they give in because he wants to show that he can push them into doing what he wants. It shows that he does not respect others.
Sources: Please see here for a complete listing of all sources that were consulted in the preparation of this article.