I loved this take on the prompt. "Home" is so often more of a feeling than a physical place, and much of your love of LiveJournal mirrors mine except that your experience got you through so many much tougher times, and helped you heal and grow and like yourself more.

The descriptions of Twitter sounded familiar (very little direct interaction, mostly randomness or shouting via 'headlines'), and the "city I drive through" comments cracked me up.

Facebook feels like the building where I work: I go there often, but always in costume while leaving my more scandalous self at home.
Yes, so much yes. There CAN be interaction, but it is usually at a much more superficial level-- partly because that's also the level at which most people post. The "public consumption" filter is so much higher there than at journalling places like LJ.

I'm so glad you found your true home, those 13 years ago, and that it still feels like home. With that, you will make it so for others down the road. :)