Hm...
well, I like my gore to be tasteful. I felt Dead Space and Doom pack too much, but then again its the selling point. Same with Splatterhouse.
Now, I did like in Persona 3 Fes how you were in this nightmarish world that exists for an hour and normal folk dont live it since they're in coffins. Theres blood all around that gives to the atmosphere. In Persona 4, I liked how you occasionally see the bodies of those that died. Nothing detailed or scarring. Just something for mood. In Parasite Eve, when the rat changes, that was rather cool as well, and a bit gory.
So yeah, enough for it to be tasteful, which of course depends on the game, but even in games like Splatterhouse, too much was too much, and this is about a game whose selling point is the gore.