Making a campaign human centric with the least amount of violence to RAW

+Joshua Macy has a complaint that not uncommon, all the players in his campaign made non-human characters. Let's face it, non humans are cool kids of fantasy roleplaying. Most races have interesting backstories, memorable characters, and of course the racial abilities. Sometimes all three like with the Drow.

Starting with DnD 3.0, later edition attempted to rectify this by giving Human their own racial abilities. Typically extra flexibility by granting a feat or two, increased ability of the player's choice, or more skills. But still it seems lacking and rather bland.

The primary way I fixed it was to grant a 15% XP bonus for humans that works the same as the XP bonus due to having a high prime requisite. Read below the fold for my reasons why.