I find that Melee attack swing increses Hate by value of Damage + Damage Bonus. STR, ATK, DEX or Weapon Skill do not affect to Hate, so increased Hate is affected only by Weapon's DMG and Damage Bonus. There is no difference between Same level WAR / PAL / RNG classes, but caster class will make small Hate, because caster has no Damage Bonus. For melee class, Damage Bonus is changed by level, so increased Hate is changed by level, too. There is no Damage Bonus for Left Hand Weapon, so Left Hand Weapon increases fewer Hate than Right Hand Weapon
In depth agro tests, beyond era but still should be accurate
http://giline.versus.jp/shiden/melee_e.htm