What can the reader expect in a story told from first-person point of view

The reader can expect an intimate relationship with the protagonist.

"That night they had a big supper, and all them men and women was there, and I stood behind the king and the duke's chairs and waited on them, and the niggers waited on the rest. Mary Jane she set at the head of the table, with Susan alongside of her, and said how bad the biscuits was, and how mean the preserves was, and how ornery and tough the fried chickens ..." (Chapter 26)

Here we get to see the world through Huck's eyes. That is a great thing because by now we like Huck more and more.

Susan, and Mary Jane...