For me I simply do not like unrealistic shit first and foremost. Yes I am all for some creative liberty to make things interesting but some porn games tend to go extreme these days.
Hate:
- Futa
- Gay
- Anything normally illegal like Loli, Shota, Rape etc,
- Vore (Just fucking weird)
- Bestiality
- Sissy Boy or Femdom
- Extreme Body Parts
Everything else solely depends on how it is executed. I have no issues with cheating and or NTR because it is actually somewhat realistic. People cheat and are cucked all the fucking time. Romantic and "vanilla" genres can be interesting too, however they are highly dependent on good writing and dialogue which tends to suck in these games.