A "home forum" is basically the forum where you pretty much.. well... grew up in, made some friends, like to spend most of your time and where you're relatively well-known.
Mine has to be at right here! I got banned several times at another forum (which I've left now) and every time I was banned I would spend my time until the ban was lifted here, which, in a kind of sense, could be referred to me as just using Eidos Forums. :/ And after being banned permanently for the first out of 3 times, I spent about half a year at Eidos Forums and really grew to love it. XD
So yeah, what's your forum home?