I think DooM was better for Marchin' in and killin' while DF was better for a good story. DooM, to me, did not even have a story line. I still like DooM better but I have only played the DF demos.
I still play DooM and DF2(demo) with my brother. Mostly DooM legacy. Is anyone up for a match of some DooM deathmatch?
All in all I enjoyed DooM better. And for those who say that DooM does not support up and down looking, it does with most source ports. Like Legacy and DoomsDay, JDRP, Risen3D (Which I never got to try).
Quake 2 player.
Real life player.