To be fair, some characters are just there to talk business. They're professionals, so they pipe in when they have something to contribute, but otherwise don't "chat".
Others, on the other hand, are more social. They crack jokes, talk about personal stuff, and pick on each other as well as answering questions or providing insight.
Does this make the latter overall more interesting and more well rounded from our perspective? Sure. But it's also realistic. Look at these forums? Look through at various regular posters that you see pop up on a regular basis. How much do you know about them, based solely on their posts? Does that mean they are one-dimensional people?
One of the problems is, background stuff is hard to work in. Everyone on Jackpoint can't be Slamm-0!, Bull, and Kane. We need the more serious characters like Glitch. Because as much fun as it is to write our characters bickering or talking about sports or complaining about feeling old or whatever, if everyone did that the sections would become nigh unreadable. Plus it would cease being as interesting when it does pop up to break the tension.
The characters pop up occasionally in fiction. And we did some Street Legends profiles. Ideally, we could have done a lot more Street Legends products, which would have let us look at each character and find interesting hooks and personality traits for them. Sadly, while *I* love the books and think they're some of the most fun products we've done, sales-wise tehy didn't do very well. Which is why we haven't gone back and done more.
So that limits us. Outside of fictional areas, we don't do much with the characters.
that said, I think you're a bit unfair to Netcat. I think she's one of the better developed characters. I don't think she's amazingly interesting, since there's no major flaws (besides marrying Slamm-0!) and no outrageous character traits to her, but that doesn't mean she's not fleshed out. Just means she's a kind of low-key individual.