The stats your characters have determine the kind of equipment they can use effectively and what guilds they may join. Only a few guilds are available to characters just starting out. These are the artisans guild, which anyone may join, the warrior guild, the sorcerers guild, the magi guild and possibly the paladin, cleric and ninja are attainable. Guilds offer characters the chance to learn special skills and spells. While warriors may develop good perception, sorcerers may learn to speak the nine available languages more easily.
Statistics are available on each guild, what their modifiers are and their stat requirements.
The rest, what is or isn't available to learn, is left up to the player to discover. Additional guilds are Explorer, Villain, Thief, Barbarian and Wizard. There are numbers to keep track of, and beating the game may require a steep learning curve. However, you can create a giant with high strength and con and go bashing away without too much trouble and take the time to learn things at a fun pace. Everything thrives and learning is abundant.