I still play Doom using GZDoom and use the Brutal Doom mod. Fun as hell and there are dozens of great megawads to play. The Brutal Doom starter pack comes with the hell on earth collection which a really good remake of the original Doom 2. I must have played through a dozen times. One amazing WAD is the Japanese Community Project which has some mind blowing maps. It has a level which when viewed in the 2D map is a multi pane comic of the level you're playing.

And the gameplay is fast. You move fast, shoot fast and die fast if not careful. The latest Doom felt like your character was walking through deep mud.