While Daggerfall offers many pre-defined classes, creating a custom class is highly recommended for experienced players or those who want to optimize their build. Custom classes allow you to select your primary, major, and minor skills, which determine how quickly you level up and your starting proficiencies. You also get to choose a set number of advantages and disadvantages. Advantages can grant powerful boons like increased starting gold, spell absorption, or immunity to certain effects. Disadvantages, such as critical weakness to magic or inability to use certain materials, lower your class's difficulty dagger rating, allowing you to select more advantages. Carefully balance these choices to create a character perfectly suited to your playstyle. For example, a spellcaster might take 'Spell Absorption' as an advantage and 'Critical Weakness to Disease' as a disadvantage.
