This is why so many forums fail, if you have to ask what type of forum to make, you probably just shouldn't make one yet, not until you have an idea you came up with on your own.
I have thought about It, and only come up with general chat and forum promotiin Ideas, and I already own a gaming fprum.<br /><br />-- 27 Dec 2012, 04:01 --<br /><br />I was hoping you'd give me ideas that would inspire me to choose maybe a entirely different idea. 🙂
Look at yourself, your hobbies, your interests, your life in general. Pick something special to you that you are decently knowledgeable about, and try to brainstorm about how to make people talk about it.
If you can see people having full scale conversations about, let's say furbies, then go for it. But, if you have something really weird like a strange obsession with staring at a wall, I'd say to pick something else.
Echoing Death180, I think that if you don't know what you want to do in the first place you shouldn't make a forum. (Especially not when you already have one forum you're running. Adding another fledgling forum is only going to double workload and make time management that much more critical to be concerned with.) Starting a forum is a ton of work and should only be done because you absolutely love that genre/forum type you'll be moving into.
If you want, instead of opening a whole new forum... just add a few sections that you'd like to have to your gaming forum then put some focus there. (Make a ton of topics there to give people things to talk about.)
Maybe add sections for movies/TV, music, news to your "off topic" section (and instead of off topic, why not call it "General Discussion"?)
This will also help you promote your existing site by giving you something to post about here on FP (possibly in the what's happening section, but if not there then at the very least in your site's topic in the promotion directory.) And it could open up some possibilities for post-exchanges or post packages (allowing people who otherwise might not have accepted a post exchange/package with your site more spots to post so they would accept an exchange/package).
Well, it doesn't really matter what other people think of it. If you think its a good idea then go ahead with it, and I'm sure there will be plenty of other people interested in it as well.
The person that said it was stupid probably said that because the gaming forums niche is extremely popular, and there are a ton of gaming forums out there. If you really want to make a gaming forum and have it be successful you will need to work extremely hard at it. I also suggest that before you even start the project, you think of something that will make your forum unique, what can you offer that other gaming forums can't/don't offer?