Well you're all wrong. Generation five allowed players to explore a new region with great landscapes, designs, music, sound effects, story and pocket monster designs.
Not only did they make 156 new monsters, but they were all very neat and echo versions of generation 1 monster who you had the pleasure of encountering throughout the game without past monsters ruining the new feel of the game.
Anyone who dislikes Generation 5 is a troglodyte.