Should forums niche down or go broad?

[Shawn Gossman]

How do you feel about forum niches in general?

Are forum niches too broad in today's very large and competitively saturated internet?

I mean "webmaster" is the broad topic of my forum and "admin forum" in a narrowed down topic but is it still too broad? Should it be narrowed down even more for better audience targeting?

How do you all feel about this? I'm especially interested in those who have a broad niche forum and why you're not narrowing it down.