Complex sentence: Advantages and disadvantages often have a thematic element to them and they often provide a direct relationship between how someone wants to role-play their character, while providing a tangible "in-game" enhancement to skill or ability rolls.
Split into simpler sentences: Advantages and disadvantages often have a thematic element to them. They often provide a direct relationship between how someone wants to role-play their character and a tangible "in-game" enhancement to skill or ability rolls.