Sure. i understand that. I just want to point out that the "blank slate" lasts only as long as it takes the group to decide on the first component (usually genre or game system). Everything flows forward from that. You may be surprised at how quickly a setting, characters, motivations and even broad story coalesce. I'm talking minutes.I am a big fan of improvisational GMing myself but I find it easier to do if I'm adlibbing off of and building onto something. My views as a player are pretty similar. The sort of complete blank slate you seem to be advocating would likely leave me with very little in the way of places to set my feet. Different people will want and/or be good at different things and that's fine.