If you have Secret Hunt, which a Thief learns, when he kills a monster, it'll be converted into fur, and you can take it to a fur shop and buy different weapons and armor then usual depending on how good the fur is. There's also an insane amount of secrets and sidequests and optional stuff. Such as Squire, Knight, Archer, Time Mage, Black Mage, White Mage, Summoner, Thief, Chemist, Mime, Calculator, Dancer, Oracle, Monk, Geomancer, Lancer, Samurai, Ninja, Bard and Mediator. There's a lot of Job Classes you can have your people learn too. Just like horoscopes, everyone has a zodiac sign, certain signs will do better against certain other signs, and vice versa. Higher Faith means the person will do more magic damage and spells like cure will have a better effect. Higher Brave means the person will take off more damage physically and take less from enemies.
There are things to consider such as Brave and Faith.
You can take five people into battle (including Ramza). As it goes on, it gets deeper, and the story gets darker. You start off as Ramza, defending a town against a group of thieves with your own squad of soldiers.
It's a story with political intrigue and religious subtleties. Final Fantasy Tactics centers around the war in Ivalice.