Weapons you can't play TF2 without.

As the title suggests: We all have at least one weapon we cherish, so what is it?

Mine's the Sandman (dodges incoming tables and chairs)I really don't care about the loss of hit points; it makes no real difference to me. I have been able to score a few taunt kills against snipers with it, and I find the stun ball very effective. Finally, Chadders and the like have began to call me "Melee Ellie" because of my apparent 'skill' with it.

I have quite a few, depending on what class.
For the heavy, my favourite is the Brass Beast. Yeah you can barely move with it, but no-one else is going to move again :p
For the spy, definitely your eternal reward. Payload. 'nuff said.
My overall favourite is probably going to have to be the degreaser. The amount of times i've taken down heavies with it in combination with the Axetinguisher.
And I made chadders jump!