Most people spend their afk time these days in Orgrimmar or Stormwind. Before that, it was Dalaran, and before that, it was Shattrath. It wasn't always like this, and for some of us, it never has been.
For example, in vanilla WoW, my home was Ratchet. Despite the guards, I felt the town belonged to the Horde, and my friends and I made any alliance in Ratchet KoS. Naturally, we weren't welcomed in Booty Bay when we hit STV, but that's another story. In The Burning Crusade, it was Halaa. Come Hellfire Peninsula or Azerothian tsunami, I was in Nagrand watching for that place to go hot. In Wrath, if you asked my guildies where I was, they'd tell you I was in Wintergrasp, sitting on the steps talking to passersby.
It's not that there's anything wrong with my computer (anymore), but I like world PvP. I like being able to escape trade chat spam without turning it off (because sometimes, people actually use it for trade). But mostly, I like feeling like part of the game world is under my protection.
Do you have an in-game home, and how did you choose it? Are you the secret spouse of an NPC in Dustwallow Marsh? Do you AFK in Exodar because you know no one else will bother you there? Or are you one of the last protectors of Astranaar after weeks of watching it get overrun by Horde in vanilla WoW?