Your abilities do quite a lot in SW, particularly in combat.
Strength - Melee weapon damage, and determines what kinds of ranged weapons you can use
Vigor - Roll Vigor when soaking wounds. (a big deal)
Spirit - Roll Spirit to recover from being Shaken (also a big deal)
Smarts - Smarts Tricks, which can give an enemy -2 defense or Shake them
Agility - Agility Tricks, which work the same way
It may seem like Smarts/Agility don't come up that much unless you're using Tricks, but remember that Tricks are opposed by the opponent's Agility or Smarts, so a low Smarts/Agility leaves you vulnerable to a canny foe.
One of the "frustrating" things about Savage Worlds character generation is how darn important ALL of the stats are - a player that stacks most of their points in one or two stats will have a fairly hard go of it. Helps keep the munchkins in check a little
