Female protagonist, I just wish I liked them more since a lot of it is really high quality and really good game. But seeing 1 girl just getting bang by like 10 different guys get boring after a while. Unlike, seeing 1 guy banging 10 different girls.
I would support more devs if they have something like a 1 time purchase or a purchase every release. But paying every month for like half a year for an update is just too annoying to deal with since they can just milk it instead of releasing actual update.
Decent story, maybe some character depth, and just some decent visuals that are at least at standard higher than something like Koikatsu should be good enough to be considered 'good' tbh.
Renpy since things like rollback and text speed are a must at this point for me, Unity can also be good if it implements basic stuff like rollback, skip unread, and text speed.
Anything under a year should be fine as long as it has a good amount of content and at least some juicy scenes. But maybe a progress update every week/month would make it look less abandoned if the update is taking a while.