What are weapon styles? Does it have something to do with dual-wielding?
The weapon styles you can choose from are: one-handed weapon, two-handed weapon, weapon and shield, and two-weapon. Two-weapon style allows you to wield two one-handed weapons, one in each hand (like Drizzt). You select weapon styles from the same proficiency list as weapons. Each style increases you combat abilities, for example, the two-handed weapon style gives you faster attack speed and an increased chance to score critical hits.