Most addicting 2 player game of ALL time, I did a synopsis on the old boards, likely long buried. The game spawned a ton of awesome sequels, each special in their own way. The series then branched off into the Puzzle Bobble series, they still make them, but they seem less charming than their older counterparts.
Also don't get me started on the DS/PSP BB titles, Taito made a horrible mistake outsourcing their series to someone else, needless to say either BB game on DS, or BB on PSP hold a candle to the originals.
Especially love Bubble Symphony as well, it's my most prized game that isn't Gradius related on my Saturn.