Want opinions regarding domain names

Hi folks,

Those who know me know that I've been working for a number of years as a professional writer.

However, I recently decided to expand my horizons into building websites and doing SEO work since I know my way around Wordpress quite well and I also know quite a bit about SEO (I've been writing a blog on the subject for a client for over a year now and actually co-wrote a book on the subject).

Anyway, I went a little crazy buying up domains, especially with all the recent sales at Go Daddy and Namecheap. I now have five domains for my business:

One for the writing business
One for the SEO business
Two for the site building business
One overall (it's a more generic term which links all of what I do together).

I don't want to reveal the domains until I get them all set up properly.

Anyway, I'm now debating what to do with all these domains. I'm considering the possibility of creating a single website using the overall domain name and using the other domains to point to subpages. Or, I could create four separate sites and then have them all mentioned on the overall domain.

BTW, I also ended up with two for the site building business because I originally had thought about just offering to set up blogs (my expertise is in WordPress as I mentioned) and bought a domain specifically for that.

However, I decided that given that WP is flexible enough for all kinds of sites and I'll be installing the shopping cart plugin anyway, there's no reason not to offer to create static sites for things like ecommerce as well. So I registered another domain name for that (and all these are in addition to the six blog domain names I own which I do adsense on -- yes, it gets very confusing since I own more than a dozen domains, most of which are not yet developed).

I'm now debating whether to break those two sections into separate pages (i.e. one devoted to developing sites and another specifically to developing blogs) or if I should set up just one for site development and have the blog domain point to it.

I hope that all didn't sound too confusing. Anyway, what I want opinions on is this: set up a single site with the different domains pointing to subpages or set up four (or five) different sites, with links pointing to each other when I reference specific services? I do worry about doing this because it could look funny to Google's bots which may assume I'm trying to game the system. I also wonder if that would make things more confusing for potential customers.

OTOH, I have exact match three word domains for all the services (writer, seo, site builder and blog) while the overall domain uses the keyword "web" (also a three word domain) so it may be better from an SEO perspective to use my exact match domains (and yes, I know that there is quite a bit of controversy as to whether exact match matters or not, but it certainly can't hurt if I have them). Not to mention that I really love the SEO domain I found since it's really catchy and I was shocked it was still available, but if it points to a subpage on my main domain, it may not be as valuable...

Thanks for any and all advice.

Eric