Perks, particularly, hidden perks with cool/unique unlock requirements seems like a great addition, a great way to get people exploring and clicking around the game even more. Have you decided if perks will be temporary or permanent? Or if a certain perk can only be unlocked in 1 certain way vs many?
I'm sure devs won't want to have too many of the scenes they labor to create locked behind a perk's acquisition, but it would be pretty cool if at least one wor two were. Like if the give Linda enough massages, they get a 'Strong Hands' perk that opens up a scene with a completely different character.