My list is:

ballbusting
castration
death
eunuch
gore
penectomy
penis torture
ball torture
scat
snuff
torture

I'll note, too, that there are a number of things that I don't like to see that AREN'T on that list because occasionally the person tagging will misclassify something, or include a tag for something that's only barely there. For instance, I don't have "cub" on my blacklist because sometimes young-looking characters are misclassified as cubs (particularly with more animal-appropriate sizes; I've seen plenty of otters misclassified as cubs, especially when size difference is at work). I don't have a "vomit" tag because sometimes it's tagged for extra saliva in a deepthroat something like that. You get the idea.

I'd prefer to be grossed out occasionally, but still find good stuff every now and again, even outside my own comfort zone. That said, the things that actually DO appear on my list are there because they're basically instant boner-kills, are very rarely misclassified, and don't really have a "half-way" setting