Fluxx is one of my favorite party games, but that could just be because I'm a sadist who enjoys watching first-time players struggle to grasp the simple concept. The ability to use specialized versions is nice, but only really works if you're playing with people who like Fluxx and have a similar interest. As an example, the Dr. Who version is fun if you're a Dr. Who fan, but not really fun if you don't know the source material. Still, every board gamer needs to play Fluxx at some point in their life.