Agreed.
I have a few forums, each is very unique and deals with the theme of the site.
www.stusplace.co.uk is my kinda general forum. I ran a forum at the same address for ages which was very similar to NTHW (.com at the time) which just never got used. I changed things around a fewtimes and eventualy came up with something that offers things to potential members.
www.sesforum.co.uk is a forum I set up for my on-line gameing clan, the South East Smugglers. We play Bf1942 and needed somewhere to keep in touch.
www.seslan.co.uk I set up as a spin off from the sesforum. We started arranging LAN partys and managed to get sponsership from Abit, DFI-Lan party, AMD and a few others. We were using part of the sesforum for LANS but once we could offer prizes like the new PCIE Radion RX600 and an AN7 NForce2 MoBo, we decided it was time to devote a site.
www.afghancombat.co.uk is dedicated to a mod I am writing for BF1942.
www.mapediting.co.uk is not in use at the moment... I set it up a while ago and offered help to people making their own BF1942 maps. After a few months, myself and a couple of members decided to do AfghanCombat. Trouble is, we just didn't have the time for both, so I closed MapEditing.
I will re-launch it after AfghanCombat is complete.
If you take a look at those links, you will see that the busyest forums arn't necesarily the ones which offer the most content.
For a forum to be popular, you need lots of members. To get lots of members, you need a popular forum.
Looks a bit catch22 at first doesn't it!
It's not realy, you just need to offer something to encourage people to sign up.
Look at your target audiance.
If you want people who are registered here to come register at your forum, there's no point in offering ANYTHINg which is already here. You need to look at what you feel is missing from here and work on that.
HTH