Any kind you want, of course, since we're talking about the Internet. But seriously, you'll want to give this topic some consideration, since there's more interest in some topics than others.
     You know the people who are your audience, since ideally you're talking about something you know about. For instance, if you're talking about Ultimate Frisbee, it's because you play it. So you know what other Ultimate people are like, and what they want to know and what they find entertaining.
     Once you know that, you can decide about which types of content will best serve their needs and how to go about finding or creating it. Here are some general categories to get you started with your brainstorming:

• Editorials
• Feature articles
• Political Opinion
• News stories
• Art galleries
• A conglomeration of the best content
• Reviews of movies, books, music
• Interviews
• Interactive features-polls,feedback, discussion groups, forums, chat.