I am a storyteller in a World of Darkness group, and I'm about to start designing a new scenario. However one of my players (let's call him Eric) is worrying me. Eric usually goes the goofball route when it comes to roleplaying. This means that he is great at doing just that (DM-ing comedic campaigns in D&D for example) but less great when it comes to actual serious roleplaying.
In my last (and first) WoD campaign (a pre-written scenario called Night of the Ghoul) he said that he played a depressed artist with a cat who lived in his backpack. However, after min-maxing him, he played the character like an agressive and borderline psychopathic thug who had almost no regard for anything, including his own life. Basically an MMO-character in the present day.
Now I want to run a proper, serious survival horror story, but I'm afraid that he will goof-out again. Is there any way I could design the story to build around this or fix this issue without just goofing-out myself?
[EDIT]: Eric's old character is now in jail for assisting in killing a hobo, digging up the corpse of his uncle and decapitating it and wounding a teenager… laughing all the way.