I've been dating on and off for 18 months since divorce.
I personally wouldn't date anyone still married, separated or not. Tried it twice both times weren't successful, too much drama. Now despite chemistry it's a straight no from me. In fact any unresolved issues concerning exes is a straight no after the first or second date.
Another biggie is chatting via text or What's App, neediness, constant attention via texting just becomes annoying especially when busy with work or the children. Sometimes people just need to unplug after a hard day. Save it for the date or the times when meeting up.
No smokers, excessive drinkers, swearing excessively is also a no, mention the word princess and I just switch off. Although me and the ex girlfriend are trying to patch things up after neediness and princess behaviour. I do have boundaries.
In the 18 months I've been dating I've had all of the above and more, ghosted, flaked on, good sex, bad sex, electric chemistry, no chemistry, a few who disguise appearance, liars, mental health issues, kindness, love, sleeping with the light on, laughs, boring dates, exciting dates, I've even been judged on how I use a knife and fork.
Never a dull moment OLD., as I've got older I've become very fussy, me and my girls have a nice life, an addition would be nice but I'm not going to destroy the hard work everyone has put in post divorce for any woman.