I went with Chrono Trigger's Lightning 2 because I liked how it came from the center of the screen instead of the sky as makes sense.
Second, I picked Dark Bomb, also Chrono Trigger. It's just a nice change of pace to see an imploding attack.
Lastly, FF IV's Ice 2. I like that it surrounds the enemy before it freezes, then ends with an amusing "ding" sound.