There are far more people interested in story and gameplay than some others realise. Some people think everyone is here just for porn which would defeat the whole purpose of us playing games.
If we wanted pure porn we'd be looking at places like Pornhub, Xhamster, Xvideo or Rule34 if we wanted well done CG animated sex.
For me, personally, Milfy City and DMD are shit. I don't mean shit as in they are badly done, they both have had a ton of effort put into them, but at it's core Milfy is just another incest game and DMD is a bit creepy in that the dad comes across like he's grooming his daughter and that was a bit weird and no way attractive. It also has side women far better than the main but no option of just going for them which is why I think Melody was a massive improvement in giving more options.
I played Milfy City a couple of weeks ago after people told me how great it was. If i'm going to play an incest game then I need an awesome story to get me hooked because incest alone doesn't interest me, it's not my kink. The only character I found attractive was the teacher and anything to do with her is rape which is something else I don't like. Now here I am, after having played it from start to finish and I couldn't name a single character. I can barely remember what happened, it just didn't interest me at all.
Yet there are games like Last Sovereign with over 50+ hours of RPG gameplay and I can remember every single character and scene that's happened because it interested me.
I can't play a game if the story doesn't interest me. Sex alone doesn't do it for me regardless of how turned on I am.
There are thousands of H games, a lot of those has gorgeous character models so they need something else to stand out.
Milfy City isnt great because of the level of writing... its great because the story is more unique than 90% of incest games, even including ICSTOR's old work... its a story where the MC isnt trying to (at first) sleep rape his family, or even has those feelings for them until the psychiatrist basically mind-rapes him into thinking he is... Then there is the fact that his mother has been grooming him since age 12 into her perfect mate, and had enough self control to wait till he is legal before going for it... Most MC's are the aggressors trying to seduce, blackmail, and even rape family members before they accept their love. Also non of the non-family members in that game whole a candle to the main cast, none of them are even above Sarah or the Aunt, let alone Caroline or Linda...
Your other options in that game are
Psychiatrist - who for all we know is asexual or the villain of the game as she has gotten nothing in sexy content, and the only story part we know is she is/was close with Linda
Teacher - fuck her sideways, this is the same bitch that ruined the MC's school life, you dont come back from that
Goth-Twins - fuck them too, their main story arc involves trying to bankrupt the MC's dad and put his family in the poor house, its laughable the MC even considers helping the dumb bitches.
Aunt's Lesbian Lover - boring as shit... she likes dick, but still considers herself "mostly" lesbian... whatever... also she isnt that attractive...
Violet - She's a whore and stripper, has a terrible attitude, and only banged the MC so that Caroline would owe her and get her NTR by some loser...
Sarah's friend - perhaps the only viable alternative, I have nothing horrible to say about her...
In DMD its even worse... D is literally the only good option despite the creepiness...well except for Georgina... but the story seems to have forgotten she existed despite the majority of the fans telling MrDots she is the best side character and the one they want content for. Instead we get the other lamers...
Elena - ewww... just mother-fucking NO !! burn that flat chested UGGO with fire... she looks just as young as D with a pre-pubescent body to boot...
Coffee Girl - Has a cute face, but looks even younger than D herself... also kinda flat...
D's Mom - If she hadnt been such a bitch, and a "cuck" fan cheating not only on the MC but on her new husband, she could have been viable, as it stands she can burn in the sun !
Asian Photographer - kind of ugly, and aside from a small peck didnt really show interest in the MC
Incest Island Daughter - she already has her daddy ! Yes she banged the MC, but she told him it was for fun, cause she loved her daddy.
Melody goes the same way where only Melody and her Aunt Amy are viable... Xianne is ugly... Sophie is cute but flat... Becca is... (cant believe I am saying this) too boring/vanilla... I guess the only other good options would be Isabella who got wrote out of the story 10 versions ago, and Jade who is off limits...