I am a creature of peace. And yet, I looooooooove playing doom. I have been playing doom since it appeared ages ago as a shareware game for ms-dos. And this incarnation of the game, even when it has deviated the origin story from the original, does conserve the wonderful single player gameplay delight. I cannot vouch for multiplayer mode, I do not play computer games in multiplayer games. Multiplayer games, I play in the real world. Videogames? I play alone.
If you have never played Doom, and can agree with the "tough guy with a mission to save the world by himself", you are in for a treat. It is suprisingly well optimized, so it should play fine even on humble systems. And unless you want to see the fleas on the monster's back from 30m away, you can easily play on conservative settings and still get a rewarding experience.