The list is endless. Perhaps that's why I am choosing to remain single.
The biggest one is if they spend an inordinate amount of time bitching about their ex.

Body odor

Male companion

Evidence of intravenous drug use....I.e., track marks

she constantly checks her watch, being obnoxious, die hard republican

1. Gets drunk and belligerent
2. No sense of humor.
3. Neediness.

Conversation lag
no laughter
complainer

1. How they are dressed -
2. If they complain about anything. From parking lot to restaurant.
3. Are they sharing their meal? Do we order for us to share items?

Pulls phone out to place on table, face up or down, bad. Only if a family member is sick or expecting a biz call is this okay with me.
Also doesn’t even remotely offer to pay or split the bill

1. Talking poorly about others (whether I know them or not)/ general negativity.
2. Treating waitstaff poorly / air of superiority
3. Poor conversationalist (no back-and-forth ebb and flow to the evening).

I can forgive most other things, (and I can 'forgive' these; I just won't ask them out again) but these are, in my humble opinion, signs of deeper issues with a person.

Sometimes flags don't show on the first date. I remember after leaving the hotel... she said she don't do "dinners". But I worked around that and we still in touch. Not telling me she is married is an uncomfortable matter to me. I don't like to eat in another man's plate, out of respect for manhood. Trying to pick up a fight with every woman that knows me... that's a deal breaker.

Is intolerant of information, calls it "racist"/Is a closeminded liberal.

Is fat, ugly or slobby.

Brings a pet with him that he couldn't live without. . . Sign of Narcissism or pathological altruism.

Willing to buy their own dinner and split it with you, but not willing to buy you your own meal.
True story!

If they continue to drink too much on your dates (and if they drive)
If they're asses to the waitstaff.
If they don't tip.
If they talk about others.
If they admit that they've cheated on their recent partners.
If they like Country and Western Music (Or Jazz Fusion).
If they flirt with the waiter on our date.

Trump voter, nasty demeanor, gossipy

1. Being extremely talkative and not letting me get a word in edgewise.
2. Being a die-hard conservative.
3. Being a fundamentalist Christian.

Guys constantly adjusting their balls.

In public. Every couple of minutes.

1. Impractical shoes
2. excessive use of the word "like"
3. Schadenfreude, (if they get pleasure from others misfortunes)

She has a mustache

she has a tattoo on her forehead of former boyfriend

she is addicted to heroin

Trump voter or a smoker

% of time talking versus.
Not understanding basic policy
Not understanding basic science
chewing with an open pie hole
Entitlement attitude

If most of the stated red flags had been questioned prior to dating why go on the date?

If I were dating.

1. A person who doesn’t want or like kids.
2. A person who doesn’t like or have any interest in art or theater.
3. A person who has no interest in travel.

Checks, or speaks on cell phone during our conversation without comment. (non-emergency)

Bad teeth, or poor hygiene.

General negative attitude.

*Makes racist or bigotry comments.

*Does not like animals.

*Stands for nothing.

Let's face it you got to click

1. Close-minded and overly opinionated
2. Nasty or sarcastic disposition
3. Intolerant and judgmental of others