Great: Lightening | Super Mario Kart
The lightening was by far the best weapon in the game. It is extremely rewarding for players with some patience and good timing. Using and timing it just right when someone was trying to clear a ramp is just great. And you actually got squished, so it's better in SMK than any of the other MK games.
Great: Wavebuster | Metroid Prime
The Wave Beam itself was good enough, and then you found this baby in Chozo Ruins. It ate your missles like the PSP eats batteries (), but it was a bloody good weapon. It just like elecrocuted all enemies to nothingness. And it locked on. Lock on, cool looking and bleedin' powerful, this is definetly the best weapon yet in any Metroid game.
Crap: Particle Beam Rifle | Halo 2
OK, so it's actually not that bad. It's just crap when yoi have it, and think "Why didn't they just give me a proper sniper rifle?" It has the same zoom and power and everything, but it friggin' overheats like most Covenant weapons. If you mistime a shot and then want to quickly fire again, you find that the weapon has to cool down. Cue lots of screaming as you are killed by 5 Brutes.
Crap: Needler | Halo/Halo 2
It looks good when you first play the game and see Grunts and Elites wielding them. They track you down! Hooray! But Oh No. What's this? AI gets the better of you again, the Needler is only any good when the enemy is using it. It doesn't track when you're using it. And the melee attack is comical.