Modern DooMs are… strange. The legendary status of Doom is granted by Doom 1 and 2. And those games are very different from Doom 3-5.
Original gameplay is quite saved by GZDoom and similar projects. Add there something like BrutalDoom add-on and you’ll get the best from both worlds: old Doom gameplay and more modern graphics.
Dog (and other big dangerous animals) owners in cities should be wearing tags with their basic ID data too. Maybe even those blinking lamps like firefighters or police. Don’t know how they’re called in English.
System Shock 2. Again. Because someone has thought it would be nice to refresh the textures and fix a bug here and there…
Do it now. Yes, right now. It is a 30-minute adventure: rsync here, some script there… And it will inevitably save your ass eventually.