That's my dilemma with eroge. I fucking love NTR/Corruption with "age-gap" fetish, but most of these games put an antagonist with a very hideous appearance or personality.
Scars of Summer, Elf Girl Reverse Isekai-ed and Tina Swordswoman of Scarlet Prison are good examples of this. All with very amazing looking girls and good premise, but the guys look absolutely awful or are too vile. And I don't mind bald, fat, tricky and deceptive male characters... But damn it, why so monstrously ugly and/or bastard?
HC3 is doing great so far with the antagonists' personalities, they are not ultra assholes. I'm really enjoying Duke's behavior towards Rose for now. He's proving to be very manipulative, but not too evil! But HC2 has let me down pretty hard in this aspect, specially in the final chapters... So I'm already prepared for the worst, lol.