Imma just make some quick comments on my thoughts on this.
-Desires (teehee) for this game.
All I really want are at least seven new characters, an interesting storyline, entertaining dialogue, and music that will make me have to change my pants several times over. ZUN can pretty much do whatever with the gameplay, IMO.
-Fragments
Am I the only person who liked the fragments and 4.00 power system? I know fragments made SA a hell of a lot easier, and having the 4.00 system made it easier for me to figure out how far I had to go until I had full power, rather than the quite arbitrary 128 or whatever system.
-Last Words
While I never actually played any of the Last Word spellcards, I'm always for seeing new patterns. ZUN has a talent for making patterns that are both aesthetically pleasing and challenging to play. More spellcards are never a bad thing.
EDIT:
What the hell are you even saying, the more the merrier :V