I tend to lean towards action and strategic games, but whatever venue, if the game holds my attention for longer than a weekend, it has done well. If you have a good idea, make it happen.
Good ideas are a dime a dozen.
You have to do something with your idea to make it valuable. I loved playing Quake, started the first All Female Quake Tournament, and the rest is history. I have a very diverse role. Much of my time is spent with our distributors sorting out various marketing, packaging, and legal issues, but I'm also responsible in creating marketing plans, handling public relations and customer service, and making sure the development part of the id team don't get bothered with non-development type issues. Making sure everyone receives a proper response can be a full time job in itself.