When the shooters moved from 2.5D sprite-based (Doom 1&2, Duke Nukem 3D) to 3D ones, something important was lost: restriction on performance many that no longer you could fight hordes of enemies, because computers of the day couldn't display them all fast enough. So, enemies got fewer, but tougher, and no longer you could experience the same sheer carnage as fighting hundreds of imps at once.
It was quite a while since I last played a 3D shooter (likely, HL2 Episode 2), so I don't really know if there is something out there that has a similar feel to good old Doom games.