As soon as I read the "defined-list" argument I thought of all the closed questions we have of the form "What's a good game for n players?" When I first started participating on this site, I was tempted to ask such questions; I was excited to find a group of experienced gamers and I wanted to find out what their favorite 5-player games were. Now I agree that they're not good questions, so I'll try to use them as a context for my answer.