PC Gaming Keyboard Macro Recommendations?

I recently got my Razer Blackwidow Ultimate to work, and I was wondering what kinds of good macros do you people set up? I have never used the macro functionality on any of the gaming keyboards I have owned, I need some recommendations. Planetside 2 is the game I've mostly been playing for a little insight I'll think of others later.

I got Razer Blackwidow as well, never once in a lifetime used single macro key.

Unless you can actually set those keys to pick a different in game loadout or something, I really don't see any reason to use those keys.