There's probably already been such a thread before, but I haven't seen one, and there's a thread for your favorite Heretic and Hexen weapons, so why not one for Doom?
So what is your favorite weapon in Doom?
Mine is the rocket launcher. It's a powerful weapon best used at range that can mulch lower enemies and easily down tougher ones.
My second favorite is the berserk fist. It is just so much fun to punch things like this, and punching barrels into enemies never ceases to amuse.
So please, feel free to share your favorite weapon and why it is.