Just like the title says. What's the one game you're dying to try? For me, it's Outbreak: Undead. I never even heard of this game until I started combing through the GenCon event catalog, but I can't wait to give it a shot.
Dread is spectacular and is my favorite game system for horror. DRYH is tremendously evocative, but I played for four hours and still didn't figure out the rules. I had to stay in the "just tell me what to roll" mode, which was nice in a way because I couldn't metagame the system.