Sorry if I repeat any - I have RTFT but I have to admit my memory is like a sieve with a great whacking hole at the bottom at the moment!
Demanding to pay - I used this as a tester after escaping my abusive ex a few years ago. I would always say I would pay for my own meal/drinks (courteously) and see how they handled themselves. Of the few dating experiences I went on I had the following:
One rambled on that he had an amazing salary so he would have felt bad if I paid as I ‘only worked at middle level’
another said I was being disrespectful to not let him pay as it’s traditional
another got very red in the face and called me a ‘lesbian fucking feminazi’
... my now DH said “okay, but next time can I treat you to the meal? Then if you want you can treat me to the one after
”.
Any mention of crazy exes.
Any judgmental comment on your choice of - well anything, from how you dress, to your makeup, what you choose to eat if you’re at a meal etc.
Lovebombing.
Expecting immediate responses from you but not showing the same ‘courtesy’ when responding to your messages.
Any attempts to put themselves on a pedestal. Mentioning passions and hobbies, job etc is fine, over the top boasting is not.
Turning up to a girls night out after two dates and professing undying love and stating he had a dream about the two of you getting married and having children - this happened to a friend of mine, she and I had gone to a comedy club after she’d met a guy for two dates. He happened to be there (on another date) but when he spotted her he tried to muscle in on our table and effectively abandoned his other date. We told him to sod off and invited her to join us.
Over touching/controlling touching is also a red flag for me, not flirty touching, but any attempt to put a hand around my shoulders, or on my shoulder. Also to silence if in a group, my ex did this, if I was getting on too well with his friends he’d stand to the side of me but ever so slightly in front, place his hand on my arm and start talking over me, after a while I didn’t even notice and just started to shut up the moment he approached...
I’m sure there are a few more but these are the ones that sprang to mind.