My Fav is the Shadow Bomb, It Kicks @SS , Because I like how It sucks Up Multiple Enemies with one blow, the only downside of it is, you can get sucked down it yourself.:D
I definitely preferred the Wind Bomb (unless I was fighting something robotic, then I'd use lightning). My favorite strategy is to get full bomb ups, fire ups, and remote control (or the helmet), then stand in one place laying bombs and detonating them. No one could get near me