I have had 2 inside cabins, 1 room with a balcony, 1 with window and obstructed view and now 1 suite. So a little of everything.
I have enjoyed each cruise equally and the cabin type hasn't greatly affected my experiences on the ship. It is most important just to be on the ship!
BTW - the Sea Princess is one of my favorite ships. You will enjoy her. You are going with a great group!