I can deal with nudity/sex most of the time, but it's a huge turn off for me when it's gratuitous. I despise, despise when movies/shows/games use nudity to draw in viewers, instead of focusing on content and narrative. This almost always happens with female characters, bar a few instances of gratuitous male nudity that're just too few and far between to become a problem. Female nudity for the sake of nudity is very illustrative of the disgusting sexism in Hollywood, and it has to fucking stop. If I want porn, I'll go to a porn website. Focus on writing good stories and characters, and especially focus on writing good female characters instead of making them sex objects. Some examples of nudity don't apply to this, but more often than not they do.
As for gore/violence, I can handle a reasonable amount of it. Game of Thrones, for example, has some good use of gore/violence (albeit failing miserably in the nudity department). Anything more than that, however, and it becomes a major turn off for me. It's incredibly concerning to me that people find it amusing when it's not necessary. In GoT, the violence is primarily there to illustrate realism. In Quentin Tarantino movies, the violence is exaggerate and sickening. I've seen people get shot, and it looks absolutely nothing like that, Quentin. I don't see how it's artistic when it's often played for gags or exaggerated humor, and it legitimately concerns me that a lot of audience members seem to enjoy gore for the sake of gore...
Violence in and of itself, however, I don't have a limit to. My limit usually comes in the form of how/why it is portrayed. I don't enjoy it, mind you, but I accept it in most cases when it's not torture porn (just because, again, why the fuck), and when it isn't played for laughs. Other forms of violence, particularly those used in a way that serves the story/themes of whatever work they're in, I can accept because the unfortunate truth is that it's mostly all realistic; people have done far, far worse in real life, and I see no reason to pretend otherwise.