Invinvibility- I got hit by car when I was a kid, but with this on, I won't have to worry if a frickin' TANK runs me over... or shoots me.
Weapon spawning- Republicans are right for once, being heavily armed is BADASS.
Infinite ammo- See above.
Infinaite money- I'm a very greedy man.
Moon jump- Jumping is FUN!
All areas unlocked- Now I can get into Area 51 without being arrested! YAY!
Special Eggs and Ice Key- From Banjo-Kazooie. They may not seem to do anything, but I still want them.