TransHab on ISS would have been useful
One of a series of posts on the NasaSpaceflight.com forums, that eventually got me a lifetime ban there. I could probably just create another account to login to that site, but I refuse. The engineers in the aerospace industry are too damned touchy, and I can't handle talking to them.
Which is probably just as well, since they're really isn't any value for them in talking to me either.