Stop - Don’t Pick the Greater Weapon Focus Feat!

D&D 3.5 rules.

So you're upgrading your fighter and it is time to pick a bonus feat.  Nothing looks too exciting and you already have Weapon Focus and Weapon Specialization with your favorite weapon.  Might as well take Greater Weapon Focus to get another +1 on your attack rolls, right?  Wrong!  There is a much better feat in the Players Handbook II waiting for you and it is called Melee Weapon Mastery.  It will give you an additional +2 not only to your attacks, but also to your damage rolls.  I can't think of any reason to choose Greater Weapon Focus over Melee Weapon Mastery because when you qualify for one, you are likely to qualify for the other.

But Melee Weapon Mastery does even more.  The benefit doesn't apply to just your favorite weapon, but to any weapon you use that does the same type of damage, slashing, piercing, or bludgeoning.  But the benefits do not stop there!  Once you have the Melee Weapon Mastery feat, your next feat can be something like Slashing Furry which allows you to take two attacks on a standard action instead of one, although they are at -5 and -10 to hit.

Melee Weapon Mastery is just one of several good feats in the PHII.