A lot of Doom reminds me of metal in general. Heck,I remember quite distinctly that there's one song (can't remember if it's Doom 1 or 2) that is the exact rhythm of Pantera's "Mouth for War" and one of Alice in Chains "Angry Chair".
Edit: Found this:
Doom - E1M1 - (simular to) Anti-Christ by Slayer
Doom - E1M4 - Rise by Pantera
Doom - E2M9 & E3M1 - Mouth for War by Pantera
Doom - E3M8 - Sgt.''D'' and the S.O.D. by Stormtroopers of Death
Doom 2 - Level 01 & 15 - (simular to) Hanger 18 by Megadeth
Doom 2 - Level 07, 19 & 29 - (bass part of) South of Heaven by Slayer
Doom 2 - Level 10 & 16 - (Introduction of) After All by Black Sabbath
Doom 2 - Level 18 & 27 - This Love by Pantera
Doom 2 - Level 23 - Them Bones by Alice in Chains
Doom 2 - Level 25 - Angry Chair by Alice in Chains
Also, here's a bunch of Doom music to listen to:
http://www.doomworld.com/classicdoom/info/music.php