Influenced by 70s and 80s heavy metal, traditional doom metal bands more commonly use higher guitar tunings, and do not play as slow as many other doom bands. Traditional doom bands typically play slow to mid-tempo songs with a thick and heavy sound with the Electric Bass following the melody line, and sometimes employ the usage of Keyboards although assuming a secondary role on traditional doom metal songs. Vocals are usually clean with the occasional growl or scream. The lyrics in traditional doom usually are eerie and dark like other doom metal divisions. Some bands who play traditional doom metal are Orodruin, Reverend Bizarre, Witchcraft, Saint Vitus, and Count Raven.

~ Wikipedia

This subreddit is not purely traditional doom metal, as there will also be a bit of epic doom metal thrown in. This subreddit also includes doomy songs from non-strictly doom bands (primarily from heavy metal and grunge rock) for as long as they still meet the aforementioned criteria and don't cross over heavily into stoner rock or sludge.

But this isn't the place for stoner doom, sludge, death doom, funeral doom, or drone metal.