Play the OG games if you want. There are a lot of mods that make it more tolerable by modern standards. If you haven't played Eternal yet, though, you definitely should if you enjoyed 2016.
I love doom 3, but I also have a vivid memory of a sleepover at a buddy's house in high school where we made a friend play it then we scared the bejesus out of him during one of the early locker scares that we saw coming and he didn't.
I liked it (well, after the Duct Tape mod, anyway) and enjoyed having more lore and info. It definitely doesn't feel like a normal doom game, though, so I'll give it that.