Since introverts think twice before they speak and they listen more than they talk, they are good at giving advice too. As they take in whatever is going around them, they think through before telling you something.
5. They give you your space.
Since introverts want their own space most of the times, they are good at providing the same. Yes, you have to be okay with them leaving a party a bit earlier than you, but you will also have the liberty of staying at the party for as long as you want.