Good question.
Rule#1, a dude shouldn't be thinking about long-term situations until he's mastered the short term situation.
If you ain't got a gaggle of hoes coming into your bedroom, then you not in position to really do anything long-term. You haven't seen enough of female nature. And you haven't proven to yourself to be able to replace a scalawag.
Most guys get stuck in relationships with bad women because they do not have the faith in themselves to replace that bad woman. "Maybe it will go back to how it was ..."
In terms of screening,
I say, get that info BEFORE you smash. She might have a snapper that will cloud your judgement.
Everybody is gonna tell you to look out for this and that, but you should also have your own independent criteria.
I don't date girls that have pets, for my own reasons, mainly that I'm allergic....to the BS that comes with her "baby". For you younger dudes, it's really in Vogue for a baddie to have a cat or a purse dog. I pray for y'all
If a chick like to talk during a movie... Etc