Larger content with slower updates. To a reasonable limit. Maybe that's why I have so many games going at the same time. When one runs out, there's another one to hold me over.
Advice that a college professor gave my class: if you want to get better at writing, read everything you can get your hands on. Not just fiction or non-fiction. Don't limit yourself to one genre. Read as much as you can. It gives you more viewpoints and styles of writing. You never know where...
I like them if they sound natural. Not overly loud or just going on too long. If it sounds like a Labrador retriever trying to swallow 6 eggs at once, I can do without it.
If the monthly payment for the used car seems a little high, open a credit union account and re-finance after 2 years of payments. There were a lot of conditions to re-finance including "Do all 4 tires match?" You gotta be kidding me. They're tires.
Harem and slice of life, definitely. Mystery is another one I like. Some intrigue elements where you have to find out what is happening to your life, your town, whatever.
I'd make a game that starts with the cliche of waking up with no memories. Your amnesia is either ignored or brushed off by your roommates. Or family, with the right patch. They'll say "You must have a lot on your mind." After a while you discover that another person in the house also woke...
Theme park. Girls in costumes, bonus points for princess dresses. Lots of places to make out with the possibility of getting caught (if that's your thing).
It's become my habit now to look over a website's rules. Otherwise you will see a must-read post something along the lines of "Since people can't read the rules, we have to [insert new procedure here]."
Either works as long as the story fits. There are some slow burn games with a story that pulls me in to the point I forget they're porn games. Like a lot of others have said, there has to be something there to keep me coming back.