police officer
leads met briefly as children, or leads have never met before
never met before (i hate it when they have some sort of connection in the past)
main character is blind or deaf
main character is deaf
fantasy: main character has magical ability, or main character has an item with magical power
Main character has magical ability
Childhood friends to lovers or ex-lovers to lovers
ex-lovers to lovers
reconcile with former spouse, or former spouse is the villain
reconcile with former spouse
main character can shapeshift into an animal or mythical creature
shapeshift into mystical creature, just because it seems less common
Main male character in his late 30's (romance drama) - never married, or previously married
never married
reincarnation or childhood connection
reincarnation
slow burn or love at first sight
slow burn
main character has siblings or is an only child
siblings
(modern day) ML's parents have high specifications for his future wife, or they are okay with anyone who seems nice
ML's parents are okay with anyone who seems nice
Married ML's are living with parents or staying alone
"with parents" often makes for a more interesting situation - I've watched a number of family dramas where this happens.
(romantic comedy) ML has a cold personality, and he unexpectedly does something very kind. OR ML is always kind with a warm personality.
Both
ML has a cold personality, and he unexpectedly does something very kind
Small town setting with tight-knit community or big city with diverse characters?
small town setting with tight-knit community
clumsy naive ML or smart jack-of-all-trades ML