Yeah, Magical Drop is good! Coincidentally, my first experience playing the series was on
Gui's Wii at the first NW NYC meet-up, and I found it to be surprisingly fun and engaging in multiplayer.
Critter Crunch is essentially the same thing as Magical Drop, right? Anyway, I'm glad that I picked MDIII up when it landed on the eShop. I think I also grabbed the weird PS1 entry (with power-ups and stuff) on PS3 from the Japanese PSN. But I am similarly lacking local competition... Why don't people like puzzlers anymore?!
Anyway, Windjammers is another multiplayer NG classic. Fingers crossed for the sequel this month!