What are your favorite Mega Man weapons?

[geo]

There are plenty of them. Chances are some overlap. I'd like to hear your favorite weapons and why. Is it the leaf shield that lets you just run through pesky birds? Is it the gear that lets you throw a projectile in 8 directions? Is it the needle gun that lets you machine gun your way to victory?

What are the most useful and the most useless weapons?

[YukiHerz]

In Classic Mega Man, I like the Time Stop in Powered Up because then I don't have to deal with annoying platforming bits.

In X Series, I like using X's Shadow Armor shot and most of Zero's techniques.

In ZXA I'm just cheeky and play most of the game in base form.

[HavoX]

MM: Pharaoh Shot, hands down the best weapon in the series, besides the Metal Blade
MMX: Tornado Fang, this puppy is the epitome of a badass weapon
(No comment on the other series' weapons because I haven't played them)

[Black-Hand]

- The Hard knuckle and the Lightning from Elecman are my favourites in the classic.
- Gravity well logic is too awesome for not to be my number one in X series.
Well the chain rod is pretty great in Zero series with the energy drain Ex Skill.

[Ichor]

Metal blade by far. One hit from that will kill Metal Man (two on hard). After that is the Quick Man boomerang and then a tie between Fire Man's and Elec Man's weapons.