smut manga question

sometimes i feel like i should make a smut manga (one volume only). maybe a bl or even a hetero one, but im just so unsure about what 2 do!!
but i wonder what makes a GOOD smut manga? i personally think to me this is what makes a good one:
- some fire (like you can feel the emotions during the scene) like HEAT FEEL HOT
- a little bit of plot build up so i can understand wtf is going on
- a teensy flashback
- a bit of insight into both characters' personalities and their opinions of one another (like if its a whole 4 chapters, at least one chapter about who they are helps me enjoy it more)
- them saying original lines whilst having sex i guess? sometimes it just feels like they're using the typical lines only sometimes and it lacks a bit of personality
- pretty art?????

Wbu? What make a good smut manga for you?