I work two jobs and am in grad school, so my plate is pretty full as well. And honestly, I feel like most of the time what I have to say is already articulated better by someone else
When you do decide to speak, you put it very nicely, though.
As for other forums... a couple of years ago I tried joining up over at ConceptArt.org, when I still had ambitions of being a professional artist. But that place is TOO massive
Just being realistic here, but in order to make any kind of name for yourself in that site, you'd need artistic devotion and ability far exceeding anything that you or I possess. Whenever I visit ConceptArt, all I see is the best of the best. I see the things that end up in the latest big-release videogame or scifi movie.
Mecha Talk has been my main go-to forum for the past few years. But there's a lot more than just Gundam going on there,
Indeed, I saw a thread all about applying logic and reason to Gundam mecha designs, and melding their concepts with existing platforms to create ideals, and plan the future of sci-fi mecha. Damn that's like half the stuff I daydream about.
It's an efficient and neutral format. I like it.