The Godfather Part II

The flashbacks in the movie are starting to annoy me.  At first I liked them, because I saw their purpose.  I also liked the plot they portrayed.  (Background of how Vito comes to power and his experiences as a child that make him the way he was).  While the purpose of the flashbacks remain the same, the spacing of them is frustrating.  I feel like some of them are too short or too long without enough of the present day shown in between.