This is probably out of place, but I like the Pathfinder RPG and am adapting its concepts to d20 Modern (so I guess it's Pathfinder with GPS). Here's what I did for Weapon Training:
For Weapon Training, characters may select from the following feats but must still meet all the prerequisites: Advanced Combat Martial Arts, Advanced Firearms Proficiency, Advanced Two-Weapon Fighting, Archaic Weapon Proficiency, Brawl, Combat Martial Arts, Defensive Martial Arts, Exotic Melee Weapon Proficiency, Improved Brawl, Improved Two-Weapon Fighting, Personal Firearms Proficiency.
The idea is that humans being versatile should get to choose from either a simple, martial, or exotic weapon, or perhaps a feat related to combat.