The focus towards think and solving puzzles that made this my favorite Paper Mario. Though the occasional vague puzzles can be frustrating. This game has hundreds of different attacks all with entertaining animations. The art and writing are in top form as well. Especially the art.
But I still do like Mario & Luigi Super Star Saga better. It is one of the funniest games of all time while also not being skill based rather than grindy.
I'm still waiting for a PROPER Paper Mario. Super Paper Mario had a great story but the gameplay was disappointing. I want partners, battles, tons of side quests, and leveling up or it's not Paper Mario. :U