Actually. I'd really dig a sonic hentai game where you play as an extra narcissistic perverted fat bastard Dr. Eggman.
Where the main gameplay is a management/strategy/conquest game about building up Egg Fleet to raid zones to procure resources and slave animals to build Egg Fleet up even more, with text-adventure segments in-between managerial segments, and simplistic naval tactic RTS for battle gameplay.
But then each zone has one of the main characters acting as its boss, with a little personal fleet and a unique flagman unit that you have to defeat to fully capture a zone. And after defeating each one of them, you enslave the character with a mind-control (or, rather, body-control) chip, and get to summon them once a day for an Akabur-style Witch Trainer sexual training schedule management segment where you make them do lewd stuff to break down their resistance to make them do lewder stuff until they get broken in one of multiple ways dependent on your training style and dialogue choices.
X-Com base building customization of a fully walkable side scrolling cross-section of the Egg Carrier is mandatory.