Based on the obvious fact there aren't many directories with that many links in who exactly is your target audience in both the short term and long term? Do you make your directory specifically for other directory owners and SEO companies to submit to simply because it has high PR or do you look at the long term and work on presenting your information for the end user who might not give a squat about PR but just want a site link and description as in dmoz?
My general directories are catering for people that treat it as a science and also for the average (if that exists) submitter. I think its important to have a diverse approach and promote a directory that can accomodate various needs and to make submitters feel welcome and not create an unfriendly and out of reach environment. Different factors come into account if its a niche directory of course, but regarding my own general directories i feel i need to accomodate a good variety of users, both now and in the future.
My goal with Massive Links has always been to cater to two groups of people, webmasters who want traffic and exposure for their site and people who are looking for information. I've taken the Yellow Pages as my example in building my directory because they accomplish this very well. There are people looking for services, advertisers looking to get business and Yellow Pages being the middle man.
My target audiance : the world. My sub category audience : the people interested in that category....
Crikey a long answer from you for a change, Kudos to the Wind Rider. @pipes; nice answer and probably why you'll stand the test of time when most others will drift away like a turd in the sewer. @chabbs; nice site, and good thinking but what would help you follow the yellow pages model is using the correct script type, (unashamed plug for phpLynx there). Combine that with what you already have and I think with the positive attitude you have you'll succeed at it.
I target at the people from SEs and SEOs and directory owners in different directories. Each directory has got different purpose and target.
A general directory with enough categories can target any audience... We should try and build a resource along with a money making machine
I prefer to be blunt and to the point, rather than ramble and rant books of posts, like some people do
My target is the entire planet... and if Martians have funds and their site qualifies, they can submit too
I target everybody who wants to visit. My site is for all ages. If you like games, it is for you, if you are a webmaster it is for you, if you have directories it is for you, if you are a seo worker it is for you. I mean its for everybody who uses the computer.
Crafty Tips Arts & Crafts Directory targets craft lovers Pet Site Guides targets pet lovers. And due to my limited language skills both target lovers of the English language.
(Pause) (Slight Sigh) Deep thought about whether a comment is even worth it? Nah, NEXT! @YMC; Nice sites you have there.