It gets really lonely in SSP whenever you have a huge city or something, and only you are inhabiting it. So I would really appreciate it if someone makes a mod that adds new AI's to the game. Such as whole villages of people. And you can have a trading system where if you Right-Click? you can give them ? and if you attack one of them, then they will all attack. But they will get over it after a LONG while, like with the New Zombie Pigmen.