I never do it just for the sake of seeing the scenes, but I still think it's a most have feature for when I need to remind myself what happened since last update.
I start by reading everything, if some parts start to drag on I skip/skim through them, if even then the game is still boring, then that's when I drop it.
It does affect it for me. I don't need a game to be perfected rated with 100 essays explaining why it is a 5 star, but I don't think I ever enjoyed a game with a rating below 3.
I may be on the minority that likes some bush down there. But it depends on the character, it would make no sense in a loli but it might look good on a MILF.
If it takes so long that I forget who the characters are or what happened in the story then I'm unlikely to pick it up again. How long does it take for me to forget those things depends on how interesting the game was in the first place so it depends from game to game.