-The physical/special split
-Sinnoh is my second favourite region
-The amount of postgame content
-The Gym Leaders, Cynthia and Cyrus are actually tough to beat
-Team Galactic is the first evil team I liked
-Torterra, Staraptor, Rotom, Togekiss, Floatzel, Gallade, Weavile, Roserade, Magnezone, Mamoswine, Palkia and Giratina-Origin
-Distortion World
-The Pokeathlon
-The Battle Frontier
-You actually had to see every Pokemon in the regional Dex to unlock the National one in the Sinnoh games.